Keith Black Pistons KB263.040 +.040" Pistons w/8.5:1 Compression Ratio for Big Twin 41-79 w/1200cc EngineFeatures & Benefits: * Bore = 3. 477in. * Stroke = 3. 969in. * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter piston to cylinder clearance. * Complete kit includes: two pistons, rings, wrist pins and clips. * Replaces OEM # 22146 55C * Replaces OEM # 22146 74A Tech Tips: * Follow Ring End Gap & Piston to Cylinder Clearances as per the supplied Manufacturers
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Keith Black Pistons KB263.040 +.040" Pistons w/8.5:1 Compression Ratio for Big Twin 41-79 w/1200cc Engine