About Certified Dirty Idle Diesel Supply
From Truck Guys, For Truck Guys
Certified Dirty Idle Diesel Supply is a Texas-based diesel performance retailer dedicated to one thing: getting you the right parts for your diesel truck without the markup or the runaround. We carry FASS, S&B, Fleece Performance, KC Turbos, MBRP, S&S Diesel Motorsport, DieselSite, Flux Diesel, and other top-tier diesel performance brands — everything you need to keep your Powerstroke, Cummins, Duramax, or EcoDiesel running stronger than stock.
What We Carry
- Fuel Systems & Lift Pumps — FASS Drop-In, No-Drop, No-Drop Plus, Titanium Signature, and Titanium Signature Plus series for every major diesel application.
- CP3, CP4 & Injection — Fleece PowerFlo CP3 conversions, S&S CP4 disaster-prevention kits, Flux Diesel injectors.
- Turbochargers — KC Turbos Whistler and Jetfire stage turbos, Fleece Cheetah turbos.
- Exhaust & Cooling — MBRP downpipe-back exhaust systems, Fleece coolant bypass kits, intercooler piping.
- Replacement Fuel Tanks — S&B and Titan 60-, 62-, and 65-gallon replacement tanks for Ford, RAM, and GM diesel trucks.
- Apparel & Merch — Diesel-truck tees, hoodies, hats, stickers, flags, and tumblers designed for the diesel community.
Why Order From Us
- Free US shipping on diesel performance parts.
- Application-specific fitment — every product is organized by year, make, model, and engine code.
- Direct support — reach us at sales@graysoncountydiesel.com.
Need Help Finding a Part?
If you can't find what you're looking for, email us with your truck's year, make, engine, and what you're trying to accomplish. We'll point you to the right part for your build.