Kb Pistons Super Duty Piston - BIG Bore TC 96/103 TO 110 10:1 +.010 — Harley-Davidson Road King, Electra Glide Ultra Classic, Street Glide (2007-2017)

KB Pistons Super Duty piston set for big bore Twin Cam 96/103 stroker builds up to 110cc displacement. Flat-top design with 10:1 compression ratio and +.010 oversized bore, paired with premium Hastings steel nitride rings and forced wrist pin oiling for durability.

Features

• Anodized top ring groove and crown
• Line2Line Abradable skirt coating (.003" total thickness) for zero initial fit and self-honing clearance
• Round wire wrist pin locks
• Premium Hastels 1.2mm×1.2mm×3.0mm steel nitride top ring with ductile Napier second ring
• Forced wrist pin oiling
• Flat-top design, 1.2cc volume, 1.083" compression height accommodates 1mm oversized valves
• Sold as a pair with all rings, pins, and locks included

Specifications

• Brand: KB Pistons
• Manufacturer Part #: KB661LCA.010
• UPC: 800745236319
• Engine Size: Big Bore TC 96/103 to 110cc
• Compression Ratio: 10:1
• Bore Oversize: +.010"
• Compression Height: 1.083"
• Top Ring Design: Flat-top, 1.2cc
• Quantity: Pair (2 pistons)
• Weight: 2.5 lbs
• Country of Origin: Mexico

Fitment

Fits Twin Cam 96/103 engine blocks bored to +.010" for stroker and big bore builds up to 110cc displacement on Harley-Davidson motorcycles.

Frequently Asked Questions

Are the rings and wrist pins included?

Yes — this pair includes all Hastings premium rings, wrist pins, and round wire locks. No separate purchase needed.

What compression ratio does this piston deliver?

10:1 compression ratio. This is a high-compression design suited for performance builds and premium fuel.

Will this fit my stock 103cc engine?

No — this piston is for big bore or stroker builds with +.010" bore enlargement. Stock 103cc engines require different pistons.

What's the compression height?

1.083" compression height with a flat-top, 1.2cc volume design that clears 1mm oversized valves.

Is the Line2Line skirt coating a coating or bore-honing?

It's an abradable coating at .003" total thickness that self-hones during initial break-in to achieve a tight, quiet running clearance.