- Triple Groove Design: Compatible with OEM keepers

More bore / thickness options are available here

flash a bootmod3 Flex Fuel enabled OTS MultiMap or custom tune

Crafted by ARP

040" Peak Lift Center Line Intake 284°

B58 Valve Guides 535 - Triple Groove Design: CompatibleOur 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