Kb Pistons Super Duty Piston - BIG Bore TC 96 TO 103 10:1 +.010 — Harley-Davidson Road King, Electra Glide Ultra Classic, Street Glide (2007-2017)

KB Pistons Super Duty piston set for big-bore V-twin 96–103cc engines running 10:1 compression ratio. Engineered for M8 Milwaukee-Eight architecture with anodized crown and Line2Line abradable skirt coating that seats in for tight clearance and quiet operation.

Features

• Anodized top ring groove and crown
• Line2Line abradable skirt coating (.003" thickness) for zero initial fit and quiet running
• Premium Hastels 1.2mm steel nitride top ring with ductile Napier second ring
• Forced wrist pin oiling
• Flat-top design 1.2cc with 1.083" compression height
• Valve pockets sized for 1mm oversize valves
• Includes all rings, wrist pins, and locks
• Sold as a pair

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB660LCA.010
• UPC: 800745243355
• Engine Size: 96–103cc (big-bore)
• Compression Ratio: 10:1
• Piston Top: Flat-top, 1.2cc
• Compression Height: 1.083"
• Quantity: Pair (2 pistons)
• Weight: 2.5 lbs
• Country of Origin: Mexico

Fitment

Fits V-twin motorcycles with 96–103cc big-bore displacement and M8 (Milwaukee-Eight) architecture running 10:1 compression.

Frequently Asked Questions

What's included in this piston set?

Two pistons per pair, plus all top and second rings, wrist pins, and wrist pin locks — ready to assemble.

Will these pistons work with stock heads?

Valve pockets are sized for 1mm oversize valves. Verify your head's valve size before ordering.

Do I need new rings when I install these?

No — premium rings are included with each piston.

What does the Line2Line abradable coating do?

The .003" coating wears in against the cylinder wall during break-in, creating a tight seal and quieter running clearance.

Are these pistons suitable for high-boost forced induction?

Super Duty pistons are built for strength, but forced induction requires proper engine tuning and supportive modifications — consult a builder before boost application.