Brian Crower BC3966-2 Polaris Pro R Fury 2.0L Valve Guides - 5.5mm Intake & Exhaust

The Brian Crower BC3966-2 are premium performance valve guides designed specifically for the Polaris Pro R Fury 2.0L engine. These guides feature BC's exclusive threaded end design where the valve stem seal seats, virtually eliminating seal blowoff at extended high-rpm operation — a critical advantage in aggressive powersports and racing applications.

Key Features:

• Threaded tip design — prevents valve stem seals from popping off under high-rpm conditions
• Manganese Silicon Aluminum Bronze alloy construction — provides excellent resistance to cracking and corrosion
• CNC machined to exacting tolerances — ensures precise fit and consistent performance
• Reduced friction properties — maintains high lubrication even at elevated engine temperatures and rpm
• 100% compatible with Brian Crower's full lineup of stainless steel performance valves
• Ideal replacement for worn or damaged OEM valve guides

The BC3966-2 valve guides are engineered to work seamlessly with BC valve stem seals (BC3992-2) and are a required upgrade when running high-lift camshafts that demand added valvetrain clearance and reliability. Designed for serious performance builds where durability and precision are non-negotiable.