80 FLH-FX Piston Set.020 Oversize - Keith Black KB297.020

Keith Black #: KB297.020

The Kieth Black 390 hypereutectic 3.5 inch bore piston set has a 8.3:1 compression ratio and is oversize.020. Piston set alloy is cast in a permanent steel molded 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)