88 Twin Cam Piston Set .030 1999 / 2006 FXST 1999 / 2006 FLST 1999 / 2006 FXD 1999 / 2006 FLT

Keith Black piston set is .030 oversize and is for a 3-3/4 bore. The Piston set has a compression of 10.6:1 and includes rings. The Keith Black 390 hyper eutectic alloy is cast in a permanent steel mold, making it possible to build a lightweight piston that produces more power, uses less fuel, and lasts longer. Pistons are .030 oversize for a 3-3/4 bore and have a 10.6:1 compression ratio. The low heat transfer of the alloy keeps the skirts cool, so piston expansion is minimal. Combining a low heat transfer piston alloy and high compression ring placement increases power and economy. The elevated ring placement alone reduces detonation and increases the maximum ring temperature. **Note: Run the engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears to properly break in new pistons and rings.

FITMENT

• 1999 / 2006 FXST
• 1999 / 2006 FLST
• 1999 / 2006 FXD
• 1999 / 2006 FLT

ACCESSORY ITEMS

• 16-0622
• 16-0075
• 60-0167