BC3931 - Brian Crower VALVE GUIDES 6.0mm EXHAUST Toyota Supra MK4 2JZ Sensors 42111 Manley Kit Button Sbc

42111 Manley Kit Button Sbc Roller

25701-16 Manley Kit Prod 4130 5/16 8

Pressure balance groove

TS-0704-1301 Turbosmart Modular Combo Block (4 Port & 2 Channel) 1/8NPT

000 Ccw 24T Bw

BC3931 - Brian Crower VALVE GUIDES 6.0mm EXHAUST Toyota Supra MK4 2JZ Sensors 42111 Manley Kit Button SbcValve Guides are a wear item. They wear over time and eventually should be replaced. The higher you rev, and the harder you push your engine, the more important tolerances become. If you are spending the time and money to upgrade your valvetrain, be sure your tolerances are correct by replacing your high mileage guides with brand new aftermarket valve guides. 2JZGTE VALVE GUIDES BC premium valves guides are made from Manganese Silicon Aluminum Bronze