B58 Valve Guides JE Head Gasket 5" Cat-Back

5" Cat-Back

these springs are designed to reduce valve float

but it's there for piece of mind

Pro-Xtreme Upgrade Details:

68mm forged fully-machined compressor wheel (78% efficiency)

B58 Valve Guides JE Head Gasket 5" Cat-BackOur 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