and charge coolers

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

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Cut Ring Head Gasket (Athena)

adjusting the timing of the intake and exhaust valves

S58 Valve Guides TiAL and charge coolersOur 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