BC Brian Crower Valve Guides for 4G63 Evo/DSM (BC3910/BC3911) Select::Set of 8 Intake Valve Guides these rods maintain bore integrity

these rods maintain bore integrity at high RPM

making it 51 pounds lighter than stock

consists of: Side skirt left eExpanding rivets only with: M sports package (SA337) or M aero package (SA715)

They were able to get weight savings of 1

BC Brian Crower Valve Guides for 4G63 Evo/DSM (BC3910/BC3911) Select::Set of 8 Intake Valve Guides these rods maintain bore integrityValve guides are crucial components that wear over time, especially with high revving 4G63 engines. To maintain proper tolerances and ensure optimal performance, it's recommended to replace worn guides with new aftermarket ones. BC premium valves guides are made from Manganese Silicon Aluminum Bronze alloy and CNC machined to exacting tolerances. BC guides are resistant to cracking and corrosion, while reducing friction and insures high lubrication