F1  Diesel
Cutting Edge Diesel Performance
Including the cast iron Helix and the billet steel Spartan, Spartan tappets, carbon tappets, and our Heavy ZDDP oil additive
Nozzle upgrades, common rail injector testing, complete remanufacturing of all brands common rail injectors
Pro/Sportsman valve springs. The first and still the best solution for 24 valve Cummins engines
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Common Rail nozzle upgrades, injector testing, and complete remanufacturing of all GM injectors