BC Brian Crower Valve Guides for 4G63 Evo/DSM (BC3910/BC3911) Select::Set of 8 Intake Valve Guides If you're looking for the

If you're looking for the largest exhaust system without sacrificing the weight

You’ll notice our harness does not incorporate the Hella-provided relay as standard

• Install Instructions (PDF Download)

• Power Increase of 15-20 HP On Stock Cars

Upper Pipe Couplers

BC Brian Crower Valve Guides for 4G63 Evo/DSM (BC3910/BC3911) Select::Set of 8 Intake Valve Guides If you're looking for theValve 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