80 FLH-FX Piston Set.010 Oversize - Keith Black KB297.010

Keith Black #: KB297.010

The Keith Black 390 hypereutectic 3.5 inch bore piston set has a 8.3:1 compression ratio and is oversize.010. Piston set alloy is cast in a permanent steel mold and includes rings.

**Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings.

Fitment:

Installation instructions (PDF)