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Suggested Additional Purchase:-Caliper Piston (DAY-20971)
• Stretched/Ribbed knees
• Powder Coated Billet Aluminum
0 certified soft protectors on the shoulders and elbows
straight-line stability and riding enjoyment
Keith Black Pistons KB297.010 +.010" Dome Top Pistons w/8.3:1 Compression Ratio for Big Twin 78-84 w/1340cc Shovelhead Engine Suggested Additional Purchase:-Caliper Piston (DAY-20971)Features & Benefits: * Bore = 3. 508in. * Stroke = 4. 250in. * 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 # 21991 80 Tech Tips: * 8. 3: 1 Compression Ratio with 117cc Head Chamber Volume. * Follow Ring End Gap & Piston to Cylinder Clearances as per the
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