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 even at elevated engine temperatures and rpm's. The perfect replacement to worn or damaged guides and 100% compatible with BC's lineup of stainless steel valves.

BC3920 - 6mm Intake (SR20det FWD/RWD)
BC3921 - 7mm Exhaust (SR20det RWD)
BC3923 - 6mm Exhaust (SR20det FWD)