{"product_id":"fass-drop-in-fuel-system-2019-2024-ram-2500-3500-cummins-difsram4001","title":"FASS Drop-In Fuel System | 2019-2024 RAM 2500\/3500 Cummins (DIFSRAM4001)","description":"\u003ch3\u003eFASS Drop-In Series Diesel Fuel System: Fits 2019–2024 RAM 2500\/3500, 6.7L Cummins\u003c\/h3\u003e\u003cbr\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/www.fassride.com\/drop-in-series-installation-manuals\"\u003eDownload the Product Manual\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003e\nThe DIFSRAM4001 Fits: 2019-2024 RAM 2500 \u0026amp; RAM 3500 6.7L Cummins\n\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e THIS IS NOT A LIFT PUMP! This is an air separation\/filtration system that utilizes your factory in-tank lift pump.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNot compatible with the FASS Fuel Sump Kit. May not fit aftermarket high-capacity fuel tanks; verify clearance before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e Installation of this kit on a cab and chassis may require modifications. Drop-In Fuel Systems are a plug-and-play filtration upgrade and \u003cem\u003eare not compatible\u003c\/em\u003e with our Fuel Sump Kit. The system mounts in the factory location and may not fit aftermarket high-capacity fuel tanks; verify clearance before ordering. No additional items are needed for installation. This plug-and-play filtration system retains the Cummins OEM fuel pump.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003e2019-2020 applications must be retrofitted with a CP3 to install this kit. This kit is NOT designed to work in conjunction with the recalled CP4.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\n\u003cstrong\u003eFASS Drop-In Technology:\u003c\/strong\u003e The FASS Drop-In Series Diesel Fuel System is engineered to be the most cost-effective and easiest solution for removing air\/vapor from diesel fuel in your diesel fuel injection system. By implementing the extreme water separator (XWS3002) filter our system will provide 2 microns absolute filtration. \n\u003c\/p\u003e\u003cp\u003e\nRemoving entrained air and vapor, Extreme Water Separation, and 2 micron absolute filtration with a Micro-Glass filter element all work together in the FASS Drop-In for Ram to optimize fuel efficiency, restore horsepower, and improve performance across the entire fuel system and engine. And that’s only scratching the surface of the benefits FASS brings to your Cummins.” \n\u003c\/p\u003e\u003cp\u003e\nImagine being able to improve MPG (fuel efficiency), horsepower, increase fuel injection system life, truly balance the engine (smoother operation) with other benefits listed below with an installation time in about 1 hour!\n\u003c\/p\u003e\u003cp\u003e\n\n\u003c\/p\u003e\u003cp\u003e\n\u003c\/p\u003e\u003cdiv style=\"max-width:560px;margin:0 auto;\"\u003e\n  \u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;\"\u003e\n    \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/0cBAuDPvZkI\" title=\"YouTube video player\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003c!-- ============================================================\n     FASS Drop-In Series — cause-and-effect chain, collapsible\n     Each card collapses to its feature bar; tap to open the chain.\n     Pure HTML + CSS (no JavaScript).\n     All classes prefixed .ffn- so nothing collides with site CSS.\n     ============================================================ --\u003e\n \n\u003cstyle\u003e\n.ffn-wrap{\n  --ffn-red:#d0343e;\n  --ffn-slate:#343b45;\n  --ffn-ink:#2b2f36;\n  --ffn-body:#5a6069;\n  --ffn-line:#e4e6ea;\n  --ffn-page:#ffffff;\n  box-sizing:border-box;\n  background:var(--ffn-page);\n  padding:34px 16px 42px;\n  font-family:Arial, Helvetica, sans-serif;\n  color:var(--ffn-ink);\n  -webkit-text-size-adjust:100%;\n}\n.ffn-wrap *,.ffn-wrap *::before,.ffn-wrap *::after{box-sizing:border-box;}\n \n.ffn-inner{max-width:1000px;margin:0 auto;}\n \n.ffn-head{text-align:center;margin:0 0 26px;}\n.ffn-title{\n  margin:0 0 10px;\n  font-size:clamp(25px,5.5vw,40px);\n  font-weight:800;\n  line-height:1.15;\n  letter-spacing:.01em;\n  color:var(--ffn-red);\n}\n.ffn-sub{\n  margin:0 auto;\n  max-width:60ch;\n  font-size:clamp(14px,3.2vw,17px);\n  line-height:1.55;\n  color:var(--ffn-body);\n}\n \n.ffn-card{\n  background:#fff;\n  border:1px solid #d5d8dd;\n  border-radius:12px;\n  overflow:hidden;\n  box-shadow:0 1px 3px rgba(20,24,31,.06);\n  margin-bottom:14px;\n}\n.ffn-card:last-child{margin-bottom:0;}\n \n\/* ---- feature bar = tap target ---- *\/\n.ffn-card \u003e summary{\n  list-style:none;\n  cursor:pointer;\n  display:flex;\n  align-items:center;\n  padding:14px 52px 14px 18px;\n  position:relative;\n  background:var(--ffn-slate);\n  color:#fff;\n  font-size:16.5px;\n  font-weight:800;\n  line-height:1.3;\n}\n.ffn-card \u003e summary::-webkit-details-marker{display:none;}\n\/* FASS \"F\" mark before each feature title *\/\n.ffn-card \u003e summary::before{\n  content:\"\";\n  flex:none;\n  width:24px;height:22px;\n  margin-right:10px;\n  background:url(\"data:image\/png;base64,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\") center\/contain no-repeat;\n}\n.ffn-card \u003e summary:focus-visible{outline:3px solid #fff;outline-offset:-4px;}\n \n.ffn-toggle{\n  position:absolute;\n  right:18px;top:50%;\n  width:18px;height:18px;\n  margin-top:-9px;\n}\n.ffn-toggle::before,.ffn-toggle::after{\n  content:\"\";\n  position:absolute;\n  left:50%;top:50%;\n  background:#fff;\n  border-radius:2px;\n}\n.ffn-toggle::before{width:16px;height:2.5px;margin:-1.25px 0 0 -8px;}\n.ffn-toggle::after{width:2.5px;height:16px;margin:-8px 0 0 -1.25px;transition:transform .2s ease;}\n.ffn-card[open] .ffn-toggle::after{transform:scaleY(0);}\n \n\/* ---- chain body ---- *\/\n.ffn-chain{\n  display:grid;\n  grid-template-columns:1fr 34px 1fr;\n  align-items:stretch;\n}\n \n.ffn-cause{padding:18px;}\n.ffn-effect{padding:18px;background:#fff6f6;border-left:3px solid var(--ffn-red);}\n \n.ffn-eyebrow{\n  display:block;\n  margin-bottom:6px;\n  font-size:12px;\n  font-weight:700;\n  letter-spacing:.03em;\n  color:#8b919a;\n}\n.ffn-effect .ffn-eyebrow{color:var(--ffn-red);}\n \n.ffn-cause p{margin:0;font-size:14.5px;line-height:1.6;color:var(--ffn-body);}\n.ffn-effect p{margin:0;font-size:16.5px;line-height:1.5;font-weight:600;color:var(--ffn-ink);}\n \n.ffn-arrow{\n  position:relative;\n  background:linear-gradient(to right,transparent 0,transparent calc(50% - 1px),var(--ffn-line) calc(50% - 1px),var(--ffn-line) calc(50% + 1px),transparent calc(50% + 1px));\n}\n.ffn-arrow::after{\n  content:\"\";\n  position:absolute;\n  left:50%;top:50%;\n  width:10px;height:10px;\n  margin:-5px 0 0 -6px;\n  border-top:2px solid var(--ffn-red);\n  border-right:2px solid var(--ffn-red);\n  transform:rotate(45deg);\n  background:#fff;\n}\n \n@media (max-width:760px){\n  .ffn-card \u003e summary::before{width:20px;height:18px;margin-right:8px;}\n  .ffn-wrap{padding:24px 12px 32px;}\n  .ffn-chain{grid-template-columns:1fr;}\n  .ffn-card \u003e summary{font-size:15.5px;padding:13px 46px 13px 15px;}\n  .ffn-toggle{right:14px;}\n  .ffn-cause{padding:15px 15px 22px;}\n  .ffn-effect{padding:15px;border-left:0;border-top:3px solid var(--ffn-red);}\n  .ffn-effect p{font-size:16px;}\n  .ffn-arrow{height:0;background:none;}\n  .ffn-arrow::after{top:-10px;margin-left:-6px;transform:rotate(135deg);}\n}\n \n@media (prefers-reduced-motion:reduce){\n  .ffn-wrap *{transition:none !important;}\n}\n\u003c\/style\u003e\n \n\u003cdiv class=\"ffn-wrap\"\u003e\n  \u003cdiv class=\"ffn-inner\"\u003e\n \n    \u003cdiv class=\"ffn-head\"\u003e\n\u003ch2 class=\"ffn-title\" style=\"text-align:center;\"\u003eFASS Drop-In Series System Features\u003c\/h2\u003e\n\u003c!-- CHANGED: intro wording per Brad 9\/26 --\u003e\n\u003cp class=\"ffn-sub\" style=\"text-align:center;\"\u003eRemove the entrained air and vapor from your diesel fuel and a chain reaction follows. \n\u003c\/p\u003e\n\u003chr\u003e\n\u003cem\u003eTap any feature to see each link in it.\u003c\/em\u003e\n\n    \u003c\/div\u003e\n \n    \u003ch3 class=\"ffn-group\"\u003ePatented Air \u0026amp; Vapor Separation - “TIMES” 2\u003c\/h3\u003e\n\n    \u003cdetails class=\"ffn-card\"\u003e\n      \u003csummary\u003eIncreases Lubricity to Fuel Injection Components\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"ffn-chain\"\u003e\n        \u003cdiv class=\"ffn-cause\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n          \u003cp\u003eAt least a 10% gain in fuel lubricity under stationary conditions — and that’s the floor. Agitation begins the moment the engine does, and vehicle motion compounds it. Restricting filters, higher elevation, heated fuel, and lower fuel levels drive air\/vapor higher yet. The field calls it “fuel starvation.” Physics calls it entrained air\/vapor. Strip it out, and lubricity gains travel well north of 10%.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"ffn-effect\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n          \u003c!-- CHANGED: \"MORE than\" removed; reserved for PACCAR MX13 \/ CP4 (Brad 9\/22, 9\/26) --\u003e\n          \u003cp\u003eFASS will “TRIPLE” the life of your fuel injection system — and keep thousands of dollars in your pocket over the long haul.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n \n    \u003cdetails class=\"ffn-card\"\u003e\n      \u003csummary\u003eOptimizes Fuel Efficiency \/ Horsepower\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"ffn-chain\"\u003e\n        \u003cdiv class=\"ffn-cause\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n          \u003cp\u003eBecause air and vapor are compressible and fuel is not, they delay fuel entry into the cylinder. Combustion starts late, the burn rate suffers, and the power stroke produces fewer BTUs than it should.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"ffn-effect\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n          \u003cp\u003eFrom the Field — FASS optimizes fuel efficiency.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCustomers consistently reporting gains of 6-11%, coupled with horsepower gains.\u003c\/li\u003e\n\u003cli\u003eCustomer consistently report the following:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eTruck Only: 1 – 2.5mpg increase\u003c\/li\u003e\n\u003cli\u003eLoaded: .5 – 1.5mpg increase\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n \n    \u003cdetails class=\"ffn-card\"\u003e\n      \u003csummary\u003eTrue Engine Balancing — Smoother \u0026amp; Quieter Operation\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"ffn-chain\"\u003e\n        \u003cdiv class=\"ffn-cause\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n          \u003cp\u003eAir\/vapor delays fuel delivery, and it does so inconsistently and unpredictably — throwing the engine out of time. Strip it out, and every cylinder hits its true contribution on every power stroke.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"ffn-effect\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n          \u003cp\u003eCustomers hear it first, then feel it — in the mirrors, in the steering wheel. The engine runs smoother, and less vibration reaches the cab. Less vibration means less stress, and less stress means a longer life.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n \n    \u003cdetails class=\"ffn-card\"\u003e\n      \u003csummary\u003eConsistent Engine Performance with HP Gains\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"ffn-chain\"\u003e\n        \u003cdiv class=\"ffn-cause\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n          \u003cp\u003eDiesel engine output depends on precise fuel injection timing, and air\/vapor undermines that precision.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"ffn-effect\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n          \u003cp\u003eYour Cummins engine was rated in a “Test Cell” — clean, non-agitated fuel, positive flow, roughly 10% air in solution. FASS delivers those same conditions in the “Real World” with the air removed, edging performance just past the “Test Cell” rating.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n \n    \u003cdetails class=\"ffn-card\"\u003e\n      \u003csummary\u003eReduces: Regens, Soot\/Emissions, EGT’s (Turbo Temps), Water\/Oil Temps, Oil Consumption\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"ffn-chain\"\u003e\n        \u003cdiv class=\"ffn-cause\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n          \u003cp\u003eShift the fuel timing and you shift the BTUs produced by every power stroke. That single shift ripples outward: how much soot is created, how and when combustion occurs, and how fast heat exits the cylinder as valve and combustion timing drift apart. Even ring seating depends on it.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"ffn-effect\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n          \u003cp\u003eEvery one of these benefits leads to the same place: COST. FASS reduces maintenance spending across the board, and while that may sound too good to be true, the physics and the customer reports say otherwise. \n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSoot\/Emissions:\u003c\/b\u003e down 18-76.8% — plus reductions across CO, CO₂, and Oxides of Nitrogen.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRegens: \u003c\/b\u003eMany customers report their regen frequency drops by about half.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEGT’s (Turbo Temps): \u003c\/b\u003etypical stock applications 50-100°F; modified applications 150°F and up, over 200°F. \u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWater\/Oil Temps: \u003c\/b\u003ereported 15-25°F.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOil Consumption: \u003c\/b\u003ecustomers have reported reduced oil consumption.\u003c\/li\u003e\n        \u003c\/ul\u003e\n\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n \n    \u003ch3 class=\"ffn-group\"\u003ePeace of Mind — “Real” Water Separation\u003c\/h3\u003e\n \n    \u003cdetails class=\"ffn-card\"\u003e\n      \u003csummary\u003eHigher Volume Water Conditions\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"ffn-chain\"\u003e\n        \u003cdiv class=\"ffn-cause\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n          \u003cp\u003eThird-party proven to remove over 99% of water. In a major contamination event, traditional and OEM cellulose filters pass water straight through to the fuel injection system — and the damage is catastrophic. The FASS Extreme Water Separator dams the flow instead, stopping that water cold.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"ffn-effect\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n          \u003cp\u003e\u003cstrong\u003eThe benefit, simply put:\u003c\/strong\u003e competitors’ filters fill with water, pass that water to the fuel injection system, and you’re looking at catastrophic damage and downtime.\u003c\/p\u003e\n\u003cspan class=\"ffn-lbl\"\u003eConventional cellulose filters (OEM\/direct competitors) — costly when it counts:\u003c\/span\u003e\u003cul\u003e\n\u003cli\u003eRepair or replace the fuel system — are the parts even available?\u003c\/li\u003e\n\u003cli\u003eReplace filters and replace fuel — more shop time, more cost.\u003c\/li\u003e\n\u003cli\u003eVehicle sits idle, producing nothing — and where are you, loaded or on vacation?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cspan class=\"ffn-lbl\"\u003eFASS Extreme Water Separator — engineered exclusively for FASS. Cheap insurance against the alternative:\u003c\/span\u003e\u003cul\u003e\n\u003cli\u003eNo fuel system repair or replacement.\u003c\/li\u003e\n\u003cli\u003eReplace filters and service fuel with FASS filters — that’s it.\u003c\/li\u003e\n\u003cli\u003eVehicle stays working.\u003c\/li\u003e\n\u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n \n    \u003cdetails class=\"ffn-card\"\u003e\n      \u003csummary\u003e2-Micron Absolute Microglass Filter — 30,000-Mile \/ 5,000-Gallon Life Expectancy\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"ffn-chain\"\u003e\n        \u003cdiv class=\"ffn-cause\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n          \u003cp\u003eCompetitors and OEMs use cheap cellulose filters with large micron ratings. Ours is 2-micron absolute microglass — 400% more efficient and much higher quality, rated at 1,500 GPH.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"ffn-effect\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n          \u003cp\u003eTo match a cellulose filter to the capability\/efficiency of a microglass element you will need a filter four times the size of filter. Our filter has four times the effective filtration, and catches finer debris along the way.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n  \n    \u003ch3 class=\"ffn-group\"\u003eCold Weather \u0026amp; Fuel Conditioning\u003c\/h3\u003e\n \n\u003cdetails class=\"ffn-card\"\u003e\n  \u003csummary\u003eExtreme Cold Weather Operations\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"ffn-chain\"\u003e\n    \u003cdiv class=\"ffn-cause\"\u003e\n      \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n      \u003cp\u003ePair our high-efficiency Micro-Glass fuel filter, rated at 1,500 GPH, with the optional FASS Heater Kit for your climate, and leave traditional OEM gelling and cold-start problems behind. \u003c\/p\u003e\n\u003cp\u003eDrop-In + FASS Heater Kit. This set up takes 2nd only to it’s brother the FASS Titanium Series PLUS Fuel System. \u003c\/p\u003e\n\u003cp\u003eLet’s take it one step further: want to preheat your FASS System with your phone from the warmth of your home? If you’re within about 250 feet, just add FASS Connect to your FASS Heater Kit.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"ffn-effect\"\u003e\n      \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n      \u003cp\u003e\u003cstrong\u003eDependable starts and smooth operation in extreme cold\u003c\/strong\u003e, with no extra modifications.  Install the FASS Drop-In System with heater kit about an hour and head into winter with confidence. To Install the FASS Drop-In System with heater kit and head into winter with confidence.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n \n    \u003cdetails class=\"ffn-card\"\u003e\n      \u003csummary\u003eMASS Flow Return (MFR)\u003cspan class=\"ffn-toggle\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n      \u003cdiv class=\"ffn-chain\"\u003e\n        \u003cdiv class=\"ffn-cause\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat happens\u003c\/span\u003e\n          \u003cp\u003eFASS keeps positive pressure on the fuel going to your engine and sends the fuel your engine doesn’t use back to the tank. That returning fuel has already passed through the FASS filters, with air\/vapor, water, and debris removed, so the fuel in your tank is constantly moving and being cleaned\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"ffn-arrow\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"ffn-effect\"\u003e\n          \u003cspan class=\"ffn-eyebrow\"\u003eWhat you get\u003c\/span\u003e\n          \u003cp\u003eEvery pass makes your fuel cleaner. Your tank holds progressively \u003cem\u003e\"Polished\"\u003c\/em\u003e fuel, and your fuel injection system always sees the cleanest fuel possible.\u003c\/p\u003e\n\u003cp style=\"margin-top:12px;\"\u003e\u003cimg src=\"https:\/\/irp.cdn-website.com\/d0fc1429\/dms3rep\/multi\/pnp234.png\" alt=\"FASS MASS Fuel Return (MFR)\" style=\"display:block;width:100%;max-width:420px;height:auto;border:0;border-radius:6px;\"\u003e\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n \n  \u003c\/div\u003e\n\u003c\/div\u003e\n  \n\u003chr\u003e\n\n    \u003ch3\u003e\u003cb\u003eWhat’s Included In The DIFSRAMX001\u003c\/b\u003e\u003c\/h3\u003e\n    \u003cp\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e (1) FASS Drop-In Series Air Separation\/Filtration System\u003c\/li\u003e\n\u003cli\u003e(1) FASS XWS3002XL Extreme Water Separator\u003c\/li\u003e\n\u003cli\u003e(1) FASS CWS1010 Coalescing Water Separator\u003c\/li\u003e\n\u003cli\u003e(1) Installation Kit Including all necessary Fittings, Bracketry and Hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n    \u003ch3\u003e\u003cb\u003eWhy Choose FASS?\u003c\/b\u003e\u003c\/h3\u003e\n    \u003cp\u003e\u003cb\u003e\u003ci\u003eOEM filtration was validated in a \"Test Cell\". It was never designed to deliver that same Performance, Productivity, and Protection in the \"Real World\" working conditions. That's why the people who build this GREAT country turn to FASS.\u003c\/i\u003e\u003c\/b\u003e\u003cbr\u003e\n    \u003cb\u003eBrad Ekstam, Founder \u0026amp; President\u003c\/b\u003e\u003c\/p\u003e\n    \u003cp\u003eSee more here at \u003ca href=\"https:\/\/www.fassride.com\/why-fass-2\"\u003e\u003cimg src=\"https:\/\/irp.cdn-website.com\/d0fc1429\/dms3rep\/multi\/WhyFassLogo-c0b6fce7.jpg\" alt=\"Why FASS\" style=\"height:28px;width:auto;vertical-align:middle;display:inline-block;border:0;\"\u003e\u003c\/a\u003e or review our craftsmanship standards at \u003ca href=\"https:\/\/www.fassride.com\/fass-craftsmanship\"\u003e\u003cimg src=\"https:\/\/irp.cdn-website.com\/d0fc1429\/dms3rep\/multi\/Craftsmanship_Logo-269e4b68.jpg\" alt=\"FASS Craftsmanship\" style=\"height:28px;width:auto;vertical-align:middle;display:inline-block;border:0;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n    \u003cp\u003e\n\n      At FASS, we don’t rush products to market, we are “Striving for Perfection Settling for Excellence”. That’s why our\n      systems have a failure rate of less than 0.5%, and why diesel owners across the country trust us to protect their\n      investments. Whether you’re daily driving your diesel truck or building horsepower, the FASS Drop-In Series Fuel System\n      gives you peace of mind and performance you can feel. Register your system with FASS\n      to activate the limited lifetime warranty.\n    \u003c\/p\u003e\n\n\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cp\u003eFits 2019–2024 RAM 2500\/3500 6.7L Cummins.\u003c\/p\u003e\n\u003ctable style=\"border-collapse:collapse; width:100%; max-width:600px;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"text-align:left; padding:6px 12px; border-bottom:2px solid #ccc;\"\u003eYears\u003c\/th\u003e\n      \u003cth style=\"text-align:left; padding:6px 12px; border-bottom:2px solid #ccc;\"\u003eMake\u003c\/th\u003e\n      \u003cth style=\"text-align:left; padding:6px 12px; border-bottom:2px solid #ccc;\"\u003eModel\u003c\/th\u003e\n      \u003cth style=\"text-align:left; padding:6px 12px; border-bottom:2px solid #ccc;\"\u003eEngine\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:6px 12px; border-bottom:1px solid #eee;\"\u003e2019–2024\u003c\/td\u003e\n      \u003ctd style=\"padding:6px 12px; border-bottom:1px solid #eee;\"\u003eRAM\u003c\/td\u003e\n      \u003ctd style=\"padding:6px 12px; border-bottom:1px solid #eee;\"\u003e2500 \/ 3500\u003c\/td\u003e\n      \u003ctd style=\"padding:6px 12px; border-bottom:1px solid #eee;\"\u003e6.7L Cummins\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"FASS Diesel Fuel Systems","offers":[{"title":"Default Title","offer_id":67478544679153,"sku":"DIFSRAM4001-FKRH","price":479.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/3271\/0641\/files\/e2a3db4b-bb55-4fb4-b844-e107eb4189ed.png?v=1794237276","url":"https:\/\/obriensdiesel.com\/products\/fass-drop-in-fuel-system-2019-2024-ram-2500-3500-cummins-difsram4001","provider":"O'Briens Diesel \u0026 Performance","version":"1.0","type":"link"}