Wiseco Black Edition Piston Kit - TC 103 CID 10.5:1 +.010 — Harley-Davidson (1999-2017)

Wiseco Black Edition piston kit for Twin Cam 103 CID engines at 10.5:1 compression, featuring Armor X coating and ArmorGlide skirt treatment for reduced wear and friction. Includes premium compression ring, Napier second ring, and 3mm oil ring for superior seal and oil control.

Features

• Premium compression ring for ultimate ring seal
• Napier second ring with taper face and underhook for improved oil control
• 3mm oil ring design with higher tension
• Armor X piston coating for reduced wear
• ArmorGlide skirt coating for reduced friction and quieter operation
• Compatible with OEM and Screamin' Eagle cylinder heads

Specifications

• Brand: Wiseco
• Manufacturer Part #: K2793
• Engine: Twin Cam 103 CID
• Compression Ratio: 10.5:1
• Oversized: +.010
• Length: 9 in
• Width: 4 in
• Height: 4 in
• Weight: 2.4 lbs

Fitment

Fits V-twin motorcycles with Twin Cam 103 CID engines requiring 10.5:1 compression ratio at +.010 oversized bore.

Frequently Asked Questions

Will these pistons work with my stock Harley heads?

Yes — these pistons are compatible with both OEM Harley heads and Screamin' Eagle performance heads.

What compression ratio will I have with these pistons?

This kit delivers 10.5:1 compression ratio for the TC 103 engine.

Do I need new rings if I'm just replacing the pistons?

This kit includes premium compression ring, Napier second ring, and 3mm oil ring — no need to buy rings separately.

What is the +.010 measurement?

The +.010 indicates these pistons are oversized .010 inches larger than stock bore diameter — your cylinder must be bored to this specification.

Will these reduce engine noise?

Yes — the ArmorGlide skirt coating reduces friction and piston slap for quieter operation compared to stock pistons.