KB Performance Hypereutectic Piston Kit 3.750 Bore 10.5:1 Harley Twin Cam 99-06

• 3.750" Standard Bore
• Compression Piston (Not Flat Top): 10.5:1
• Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy
• Allows a tighter fit and longer piston and ring life
• Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005") tolerances from piston to piston
• Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
• Replacement piston rings sold separately
• KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance
• Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation
• Use lock rings Part #DS09130001 (4-pk)

1999-2006 Harley-Davidson Twin Cam 88' models