Keith Black KB343 .030 88-Inch Twin Cam Piston Set

Keith Black piston set is .030 oversize and is for a 3-3/4 inch bore. Piston set has a compression of 10.6:1 and includes rings.

The Keith Black KB343 .030 88-inch Twin Cam Piston Set features hypereutectic alloy pistons cast in a permanent steel mold. This construction supports a lightweight piston design intended to help produce more power, improve fuel economy, and promote long service life. The pistons are .030 oversize for a 3-3/4-inch bore and have a 10.6:1 compression ratio.

The alloy's low heat transfer helps keep the skirts cooler, minimizing piston expansion. Combined with high compression ring placement, this design is intended to support power and economy. High ring placement also helps reduce detonation and increase top ring temperature.

New pistons and rings should be broken in by operating the engine at moderate speeds for at least 500 miles and avoiding excessive operation in lower gears. Refer to the piston fitment instructions for installation guidance. This piston set is listed for 1999–2006 Harley-Davidson FXST models and 1999–2000 Harley-Davidson FLST models.

Brand: Keith Black. Part number: KB343 .030. Unit of measure: set. Country of origin: Mexico.

Features:

• Construction: Hypereutectic alloy pistons cast in a permanent steel mold.
• Oversize: .030 oversize for a 3-3/4-inch bore.
• Compression Ratio: 10.6:1.
• Heat Management: Low heat transfer helps keep the skirts cool and minimize piston expansion.
• Ring Placement: High compression ring placement is designed to support power and economy, reduce detonation, and increase top ring temperature.
• Break-In: Run the engine at moderate speeds for at least 500 miles and avoid excessive operation in lower gears to properly break in new pistons and rings.
• Fitment: Listed for 1999–2006 Harley-Davidson FXST models and 1999–2000 Harley-Davidson FLST models.
• Unit of Measure: Set.
• Country of Origin: Mexico.

Fitment:
Harley Davidson FLST 1999
Harley Davidson FLST 2000
Harley Davidson FLST 2001
Harley Davidson FLST 2002
Harley Davidson FLST 2003
Harley Davidson FLST 2004
Harley Davidson FLST 2005
Harley Davidson FLST 2006
Harley Davidson FLT 1999
Harley Davidson FLT 2000
Harley Davidson FLT 2001
Harley Davidson FLT 2002
Harley Davidson FLT 2003
Harley Davidson FLT 2004
Harley Davidson FLT 2005
Harley Davidson FLT 2006
Harley Davidson FXD 1999
Harley Davidson FXD 2000
Harley Davidson FXD 2001
Harley Davidson FXD 2002
Harley Davidson FXD 2003
Harley Davidson FXD 2004
Harley Davidson FXD 2005
Harley Davidson FXD 2006
Harley Davidson FXST 1999
Harley Davidson FXST 2000
Harley Davidson FXST 2001
Harley Davidson FXST 2002
Harley Davidson FXST 2003
Harley Davidson FXST 2004
Harley Davidson FXST 2005
Harley Davidson FXST 2006