Keith Black.030 Oversize Twin Cam Piston Set for 1999–2006 Harley FXST/FLST

This.030 oversize piston set is for a 3-3/4 inch bore and delivers a 10.6:1 compression ratio, with rings included for immediate installation.

Constructed from hypereutectic alloy and cast in a permanent steel mold, these pistons balance lightweight strength with durability to boost performance while helping reduce fuel consumption.

• Oversize:.030 for a 3-3/4" bore
• Compression: 10.6:1
• Includes piston rings
• Hypereutectic alloy, cast in a permanent steel mold for consistent quality
• Low heat transfer alloy keeps piston skirts cooler, reducing expansion and wear
• High ring placement minimizes detonation and stabilizes top ring temperature
• Compatible with Harley-Davidson FXST, FLST, FLT, and FXD models from 1999 to 2006
• Part number KB343.030

For best results, perform a proper break-in: run the engine at moderate speeds for at least 500 miles to seat rings and piston surfaces.

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.

Upgrade your Harley Davidson Twin Cam engine with the Keith Black 11-2273 piston set, designed specifically for models ranging from 1999 to 2006. Crafted with the advanced hypereutectic alloy, these pistons are cast in a permanent steel mold, ensuring a lightweight yet durable construction that enhances engine performance while reducing fuel consumption. The.030 oversize pistons are engineered to fit a 3-3/4 inch bore, optimized for high compression ratios and increased power output. The 10.6:1 compression ratio promotes better combustion efficiency, resulting in more torque and improved fuel economy. The unique low heat transfer properties of the alloy help keep the piston skirts cooler, minimizing expansion and wear, which extends the lifespan of the components. The high ring placement further reduces detonation risks and elevates the top ring temperature, contributing to engine stability at higher RPMs. Proper break-in is essential for optimal performance; run the engine at moderate speeds for at least 500 miles, avoiding excessive operation in lower gears to ensure proper seating of the rings and piston surfaces. For detailed installation instructions, refer to the provided link. This piston set includes all necessary components and is compatible with a variety of Harley Davidson FXST and FLST models, making it an ideal choice for engine rebuilds or performance upgrades. Enhance your motorcycle’s power, efficiency, and longevity with this high-quality piston set from Keith Black.

Features:

• Hypereutectic alloy construction for durability and lightweight performance

• Cast in a permanent steel mold for consistent quality

• Oversize:.030 for a 3-3/4 inch bore, ideal for engine rebuilds

• Compression ratio: 10.6:1 for increased power and efficiency

• Low heat transfer alloy keeps piston skirts cool, reducing expansion

• High ring placement minimizes detonation and improves top ring temperature

• Engine compatibility: fits Harley Davidson FXST and FLST models from 1999-2006

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