Due to high demand, tuning turnaround is a minimum of 2 weeks. Current lead times on custom built turbos is ~1 month. Please plan accordingly. We thank you for your support of the finest parts available for the 6.5L Turbo diesel platform!


Fuel Inlet Upgrade for DS Pumps

Quadstar Tuning LLC

  • $34.99


DS4 injection pump 3/8" fuel supply upgrade.  This replaces the restrictive factory 1/4" inlet fitting that screws into the regulator assembly and allows you to run a new, larger, fuel supply line directly to the injection pump.

Now featuring 100% aluminum construction! Our adapter fittings are milled from virgin aluminum stock, specifically for this application.

Both fittings are full-flow style for maximum performance and the hose barb is a push lock style. Does not require an unattractive hose clamp or expensive braided hoses for this low pressure system.

If you want to use a stock FFM (fuel filter manager), simply order two sets of 90* fittings!  You can drill/tap your FFM and screw in the same fitting that goes on the injection pump and run a 3/8" connecting hose up and over the plenum to attach. Alternatively, you can upgrade to one of our spin-on style fuel filters and remove the stock filter manager entirely.


We Also Recommend