2020-2023 GM 6.6L Duramax L5P

The FASS Diesel Fuel Systems XL Filter Pack is your all-in-one maintenance solution. Perfect for stocking your shop or prepping for regular servicing, this bundle includes both the new Extreme Water Separator and a matched particulate filter—making it simple to keep your FASS fuel...

Got a pinched O-ring or corroded check ball?This kit contains our Viton O-rings in two separate sizes (17mm and 30mm) along with a Viton check ball to help get your fuel pump back to proper condition. Kit Includes: 2 x OR-17 (17mm O-ring) 2...

For those who desire the absolute best protection against gelled fuel in cold climates. This kit includes both our High Output Electric Heater Disk and Dual Electric Heater Probe Kit, for up to 500 watts of fuel-thawing power!This ULTIMATE Electric Heater Kit is engineered...

Fits: 2020-2025 Crew Cab Short Bed L5P Duramax Part No: DIFSL5P2001 The FASS Drop-In Series Diesel Fuel System was engineered by FASS to be the most effective filtration solution for the L5P Duramax. Backed by our limited lifetime warranty, the Drop-In Series Fuel System...

Fits: 2017-2019 Crew Cab Short Bed L5P Duramax Fits: 2017-2025 Crew Cab Long Bed L5P Duramax Part No: DIFSL5P1001 The FASS Drop-In Series Diesel Fuel System was engineered by FASS to be the most effective filtration solution for the L5P Duramax. Backed by our...

FASS Fuel Systems Drop-In Fleet Filter Pack FLP1000 Part No: FLP1000 Perfect for the shop or keeping your garage stocked, each FASS Fuel FLP3000 contains two (2) (XWS3002XL) Extreme Water Separator Filter and two (2) (CWS1010) Coalescing Water Separator! Designed with convenience in mind,...

FASS Fuel Systems Drop-In Filter Pack FP1000 Part No: FP1000 Perfect for the shop or keeping your garage stocked, each FASS Fuel FP3000 contains one (1) (XWS3002XL) Extreme Water Separator Filter and one (1) (CWS1010) Coalescing Water Separator! Designed with convenience in mind, our...

Part No: SK5501 Fitment: Universal Applications, Ford Powerstroke, GM Duramax and Dodge RAM Cummins: Installing a FASS Fuel System has NEVER been easier! Our all-new Return Style Fuel Tank Sump Kit only requires a single hole to be drilled into the fuel tank, and...

Part No: BFC1001K The OEM plastic fuel filter cap on your L5P Duramax is susceptible to rounding off when replacing the water separator and cracking during extreme cold weather conditions. Upgrade your OEM plastic fuel filter housing or FASS Drop-In Series with our Billet...

Core Return: Exergy requires that all cores be returned within 30 days from original purchase of product. If you fail to return the core(s) within 30 days, you will be charged in full for the core(s) ($150 per injector). Cores that have missing and/or...

Are you losing rail pressure from your original worn out Denso HP4 pump? Are you looking for a pump with a proven long haul track record?  From stock up to 650+HP our Sportsman L5P CP3 pumps are the best and most affordable solution for...

Are you looking for an increase in power without sacrificing drivability or reliability? Well, look no further than our 60% over fuel injectors!   The nozzles are enlarged using abrasive flow honing technology and are hydraulically flow matched to less than 1%. Each nozzle...

Have your original or aftermarket injectors left you stranded? Are you looking for an increase in power without sacrificing drivability or reliability? Well, look no further than our 30% over fuel injectors!   At 30% over stock, these are an excellent upgrade for close...

So, you've made some power but now you want more? Do you still want good drivability while running more competitive events? Well, look no further than our 200% over fuel injectors!    The nozzles are enlarged using inhouse micro EDM (Electrical Discharge Machining) and...

Do you want to edge out that Mustang at the track or put another 5' on the next truck? Are you looking for an increase in power without sacrificing drivability or reliability? Well, look no further than our 100% over fuel injectors!   The...

One of the biggest pumps on the market with a track record to prove it. A single CP3 pump that will easily support 1200HP and in some applications have gone up to 1350+HP on fuel only! Don’t get caught with dual pump issues when...

Looking for a single CP3 pump that will support up 1000+HP and drive like stock on your L5P? Do you want the capability of more power without the worry of a pump controller failing, a custom belt breaking, mount cracking, or even a second...

Has your factory pump hit its limit, and you still need more pump capacity? Do you want the capability of more power without the worry of a multi-pump controller failing, a custom length belt breaking or a second pump to worry about? For applications...