Description
Overview
The PACCAR Fuel Line Adapter Kit from FASS Fuel Systems is purpose-built for late-model PACCAR MX-13 engines that do not have a frame-mounted water separator. When you’re installing a FASS Industrial Series Fuel System on one of these trucks, this adapter kit bridges the gap between the FASS feed and return lines and the factory fuel module, giving you a clean, reliable connection without reinventing your existing fuel line and fittings setup.
Sold as a complete kit, the PAK-2001 includes the fittings needed to adapt both the FASS return and feed lines while retaining the factory fuel module fittings. It also adapts the factory suction line over to the FASS system, so you’re not left improvising with mismatched fuel hose fittings or fuel line connectors that weren’t designed for the application.
Key Benefits
Beyond simple adaptation, this kit includes a new spring and PRF (pressure regulator/relief component) designed to bring system pressure down to approximately 12 psi, rather than the factory’s standard 16-18 psi. That pressure adjustment matters when pairing with a FASS Industrial Series Fuel System, helping the whole fuel delivery setup work together the way it was engineered to.
Every fitting in the kit is machined from 6061 T-6 billet aluminum and finished in black, giving you a durable, corrosion-resistant connection point that’s built to handle the demands of heavy-duty diesel fuel systems. For techs and fleet owners who already deal with fuel line quick connect hardware, quick connect fuel line fittings, and an fittings for fuel lines on a regular basis, this kit fits right into that same category of dependable, application-specific hardware — just scaled and engineered for PACCAR trucks.
Fitment
This adapter kit is designed specifically for PACCAR Truck/SUV applications — specifically late-model Paccar MX-13 engines that lack a frame-mounted water separator. It is intended to pair with FASS Industrial Series Fuel Systems and is not a universal fuel hose quick connect or generic automotive fuel line kit; confirm your engine configuration before ordering to ensure proper fitment.
Highlights
- Adapts FASS feed and return lines to the factory PACCAR fuel module
- Adapts the factory suction line to the FASS system
- Retains factory fuel module fittings — no permanent modification needed
- Includes new spring and PRF to reduce pressure to approximately 12 psi
- Machined from 6061 T-6 billet aluminum with a black finish
- Sold as a complete kit for straightforward installation
For shops and owner-operators working with fuel lines and fittings on PACCAR trucks, this kit takes the guesswork out of adapting a FASS Industrial Series System to a setup without a frame-mounted water separator, delivering a purpose-matched solution instead of a patchwork of generic fuel line fittings.
