Valvetronic (variable lift) power plant of the 2021+ BMW G80 / G81 M3

adjusting the timing of the intake and exhaust valves

Stainless oil drain line kit

Cut Ring Head Gasket (Athena)

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S58 Valve Guides TiAL Valvetronic (variable lift) power plantOur 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