KB Performance Hypereutectic Piston Kit 3.780 Bore 8.8:1 Harley Twin Cam 99-06

• 3.780" Bore (+.030" over standard)
• Compression Piston (Flat Top): 8.8:1
• 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 #DS09130002 (4-pk)

1999-2006 Harley-Davidson Twin Cam 88' models

Manufacturer's Warranty

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