Extensively tested on a range of setups in both our drivers' and customers' cars

Stainless oil drain line kit

this damper delivers balanced torsional crankshaft vibration damping across all RPM ranges

Cut Ring Head Gasket (Athena)

these SuperSprint Headers were the first application of a stepped design on the E46 M3

S58 Valve Guides TiAL Extensively tested on a rangeOur HD bronze valve guides for the BMW S58 engine are engineered for extreme performance, high boost applications where OEM materials reach their limits. These guides replace the factory BMW valve guides in the cylinder head (intake and exhaust assemblies). Built to withstand extreme heat, aggressive valve spring pressures, and sustained high RPM operation, they deliver exceptional stability and durability under the most demanding conditions. Machined