Order processing time has increased due to simultaneous tax & stimulus refunds. Please email us ahead of time if you are on a specific timeline. Turbos and plenums are made to order and will have additional lead time. As always, we appreciate your support of our small business and look forward to working with you!


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