Keith Black Pistons KB292.030 +.030" Dome Top Pistons w/8.2:1 Compression Ratio for Sportster 72-85 w/1000cc EngineFeatures & Benefits: * Bore = 3. 218in. * Stroke = 3. 812in. * Fits Iron Head Sporty. * 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 # 22255 83 Tech Tips: * 8. 2: 1 Compression Ratio with 110cc Head Chamber Volume. * Follow Ring End Gap & Piston to
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Keith Black Pistons KB292.030 +.030" Dome Top Pistons w/8.2:1 Compression Ratio for Sportster 72-85 w/1000cc Engine