Brian Crower 7mm RWD Exhaust Valve Guides (Pulsar 90-94/180SX 90-97) High Quality

Description

BC3921 – Nissan SR20DE(T) – RWD Exhaust Valve Guides (7.0mm stem dia)
7.0mm Exhaust – Manganese Silicon Aluminum Bronze

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.

A valve guide is a cylindrical piece of metal, pressed or integrally cast into the cylinder head, with the valve reciprocating inside it. Guides also serve to conduct heat from the combustion process out from the exhaust valve and into the cylinder head where it may be taken up by the cooling system.