Kibblewhite 20-2134C Cast Iron Exhaust Valve Guide Oversize Harley-Davidson - 0.004

The Kibblewhite 20-2134C is a precision-engineered cast iron exhaust valve guide designed specifically for Harley-Davidson engines, manufactured with +0.004" oversize dimensions for proper bore fitment after machining or wear.

Premium Cast Iron Construction:

Kibblewhite Precision Machining (KPMI) produces these guides using their proprietary cast iron specification, developed through extensive chemical analysis and material testing. The alloy is precisely formulated with controlled amounts of carbon, silicon, manganese, nickel, chromium, copper, and sulfur to create a highly pearlitic microstructure with dense, fine grains that deliver exceptional wear resistance and durability in high-temperature exhaust applications.

Key Features:

• +0.004" oversize for machining into worn or oversized guide bores
• Exhaust-specific design for high-temperature performance
• Proprietary pearlitic cast iron alloy with optimized grain structure
• Superior wear resistance compared to standard cast iron guides
• Precision-ground to exact tolerances for proper valve stem clearance
• Direct replacement for OEM Harley-Davidson exhaust valve guides

These guides are ideal for engine rebuilds where cylinders have been bored or guide bores require oversized components to restore proper clearances and ensure reliable valve train operation.