Fastheads upgrades are proven more durable than OE. Fixes inherent problems with OE valve trains as needed. Replaces OE valves with CrN DLC PVD hard surface Del West Titanium valves, factory OE springs superseded or upgraded if needed. Retains factory engineered valve and spring weights. No power loss or possible valve oat as compared to heavy stainless steel valve conversions. Maintains stock or better power over OE.