If you’re doing the classic 7.3 Powerstroke 6637/BHAF intake mod, the filter is the whole point: big surface area, less restriction, built for work. The 6637 style has lived forever in the heavy … read more

If you’ve got oil pooling in the 7.3 engine valley (under the fuel bowl/HPOP area), the HPOP is always on the suspect list—especially the rear/end plug and the high-pressure discharge fitt … read more

If a 1999–2003 Ford 7.3 Powerstroke is leaving oil in the valley, one of the first suspects is the high-pressure oil (HPOP) hose and its STC quick-connect fittings. The upgraded Riffraff HPOP JI … read more

Parts Required: Riffraff Diesel Billet Manifold Plenums 1994-2003, including: (2) Billet plenums (2) Viton o-rings (1) Installation hardware packet   Recommended Parts: Turbo/pedestal o-ring k … read more

Ford’s stock 6.0L fuel system is what’s known as a “deadhead” system. Fuel enters one side of the head and hits a dead end at the other end, which contributes to hotter fuel at … read more