4 low-side auxiliary outputs for meth

Increased thermal capacity for sustained performance

Crafted by ARP

040" Peak Lift Center Line Intake 284°

B58 Valve Guides 535 4 low-side auxiliary outputs forOur 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