Purpose-built for the PACCAR MX-13 (EPA 13 and EPA 24) engine platform, the FASS Drop-In Series Diesel Fuel System is the most cost-effective, easiest way to strip air vapor and entrained air out of your fuel before it reaches your injection system. Cleaner fuel means longer injector life, restored horsepower, and sharper throttle response — all from a true plug-and-play install.

Why Choose the FASS Drop-In Series Diesel Fuel System?

Triples injection system life – Removing entrained air and air vapor protects your diesel injection components from premature failure.
Restores power and response – Eliminating contaminants optimizes MPG (results will vary), restores horsepower, and sharpens throttle response.
Increases fuel lubricity – Boosts lubricity by at least 10% by pulling entrained air and air vapor out of the fuel.
True 100% drop-in – No cutting, no wiring, no additional modifications. Installs in an hour or less.
Flexible mounting – Inlet ports usable on either side, air separation ports usable on either side, and a single outlet on top of the filter base.
Built to last – Machined in the USA from 6061-T6 billet aluminum and Type 3 hardcoat anodized black for corrosion resistance.
OEM-friendly – Excellent choice for heavy equipment OEMs; runs alongside OEM filtration or as the final filtration stage for the injection system.

Installation Highlights

FASS Drop-In Technology was developed to deliver industry-leading filtration with the simplest possible installation, making this a true bolt-in upgrade. If you're mechanically inclined, you can install it in your driveway in less than an hour — no cutting, wiring, or additional modifications required.

Fits These Models

Engineered for the PACCAR MX-13 platform, including EPA 13 and EPA 24 engines.

Specifications

4x SAE 10 (O-Ring Boss) fuel inlet ports
1x SAE 10 (O-Ring Boss) fuel outlet port
2x 1/4" Male JIC air separation ports
2x 1/8-27 NPT fuel inlet pressure ports
300 PSI max pressure rating when equipped with the PF1002
500 GPH max flow rate
Machined in the USA from 6061-T6 billet aluminum
Type 3 hardcoat anodized black for corrosion resistance

Key Features at a Glance

Air separation - Removes air vapor and entrained air to protect injectors
Plug-and-play - 100% drop-in with no additional modifications
Flexible porting - Dual-side inlet and air separation ports for easy mounting
500 GPH flow - High flow capacity for demanding platforms
USA-machined billet - 6061-T6 aluminum, Type 3 hardcoat anodized

Notes

300 PSI max pressure rating applies when the system is equipped with the PF1002.
Can be run in addition to OEM filtration or as the final filtration stage for the injection system.
MPG results will vary.

Questions? We're Here to Help.

Have questions about upgrades for your PACCAR MX-13? Contact FASS Motorsports and we'll get you dialed:

Phone: 636-429-7020

Email: info@fassmotorsports.com

FASS Diesel Fuel Systems

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FASS Drop-In Series Diesel Fuel System for PACCAR MX-13