Brian Crower BC3921 Exhaust Valve Guides (7.0mm) for 1989-1999 Nissan 240SX

Vehicle Fitment

• 1989-1999 Nissan 240SX (SR20DE / SR20DET, RWD)
• 1991-1998 Nissan Silvia / 180SX (SR20DET, RWD)

Features

• Premium valve guides machined from manganese silicon aluminum bronze alloy
• 7.0mm stem diameter exhaust guide
• Resistant to cracking and corrosion
• Reduced friction for better lubrication under high RPM
• Compatible with Brian Crower stainless steel exhaust valves
• Engineered for RWD SR20DE and SR20DET engine platforms
• Set sold as full head exhaust valve guide replacement
• Perfect for rebuilds or upgrading worn exhaust guides

Specifications

• Position: Exhaust valves
• Guide Diameter: 7.0mm stem
• Material: Manganese Silicon Aluminum Bronze
• Quantity: 8 guides (sufficient for 4 cylinders)
• Compatibility: SR20DE and SR20DET engines, rear-wheel-drive

Included Components

• 8x BC3921 Exhaust Valve Guides

Product Description

The Brian Crower BC3921 Exhaust Valve Guides are designed for SR20DE and SR20DET engines used in various Nissan 240SX and Silvia/180SX models from 1989 through 1999. These bronze exhaust guides offer excellent durability, resisting cracking and corrosion while delivering reliable performance under high exhaust temperatures and intense operating conditions.

With a 7.0mm stem diameter, they are a direct replacement for the OEM exhaust valve guides and are fully compatible with Brian Crower's stainless steel exhaust valves. Ideal for enthusiasts performing head rebuilds, track duty, or those needing to refresh worn exhaust guide components. Installation requires removal of the cylinder head and typical machining for guide presses; ensure proper tolerances and lubrication during assembly.