1982 - 1984       BMW E30       323i

Increased thermal capacity for sustained performance

Billet E Piston

- Triple Groove Design: Compatible with OEM keepers

and overall drivability—on both street and track

B58 Valve Guides 535 1982 - 1984 BMW E30Our 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