74 FLH-FX Piston Set.070 Oversize - Keith Black KB263.070

Keith Black #: KB263.070

Keith Black 390 hypereutectic piston set is.070 oversize and is for 3.438 inch bore. Pistons have a compression of 9.0:1.

**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)