040" Peak Lift Center Line Intake 284°

and overall drivability—on both street and track

4 low-side auxiliary outputs for meth

Billet E Piston

- Triple Groove Design: Compatible with OEM keepers

B58 Valve Guides 535 040" Peak Lift Center LineOur HD bronze valve guides for the BMW B58 engine are engineered for high 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 elevated temperatures, increased valve spring pressures, and sustained high RPM operation, they deliver exceptional stability and durability under demanding conditions. Machined