Keith Black KB288.020 80 Inch FLH-FX Piston Set .020 Oversize

Keith Black dome piston set is .020 oversize with a 7.2:1 compression ratio for 1980-1984 80 inch Shovelhead models.

The Keith Black KB288.020 piston set is designed for 80-inch FLH-FX applications and features a .020-inch oversize for a 3.498-inch bore. Cast from hypereutectic alloy in a permanent steel mold, the pistons are designed to provide a lightweight construction, reduced expansion, and improved durability. The alloy’s low heat transfer helps keep the skirts cooler during operation.

High compression ring placement is designed to support power and fuel economy while reducing detonation and increasing top-ring temperature. The set has an 8:1 compression ratio. Confirm application details before installation to ensure compatibility with your engine.

For proper break-in, run the engine at moderate speeds for at least 500 miles and avoid excessive operation in lower gears while the new pistons and rings seat. The manufacturer provides a Keith Black Sym-Asym Piston Installation Guide for installation reference. This product is supplied as a set.

Features:

• Brand: Keith Black
• Part Number: KB288.020
• Application: 80-inch FLH-FX piston set
• Oversize: .020 inch
• Bore: 3.498 inches
• Compression Ratio: 8:1
• Material: Hypereutectic alloy cast in a permanent steel mold
• Design: Low heat transfer alloy helps minimize piston expansion
• Ring Placement: High compression ring placement
• Break-In: Run at moderate speeds for at least 500 miles and avoid excessive running in lower gears
• Unit of Measure: Set

Fitment:
Harley Davidson FL 1978
Harley Davidson FL 1979
Harley Davidson FL 1980
Harley Davidson FL 1981
Harley Davidson FL 1982
Harley Davidson FL 1983
Harley Davidson FL 1984
Harley Davidson FLT 1979
Harley Davidson FLT 1980
Harley Davidson FLT 1981
Harley Davidson FLT 1982
Harley Davidson FLT 1983
Harley Davidson Fx 1978
Harley Davidson Fx 1979
Harley Davidson Fx 1980
Harley Davidson Fx 1981
Harley Davidson Fx 1982
Harley Davidson Fx 1983
Harley Davidson Fx 1984
Harley Davidson FXR 1982
Harley Davidson FXR 1983