S&S Cycle Cylinder & Piston Kits — Harley-Davidson Electra Glide, Softail Heritage Classic, Electra Glide Classic (1955-2026)

S&S Cycle 136 cubic inch cylinder and piston kit delivers bolt-on big-displacement power for Harley-Davidson, machined to 4.320 in. bore and requiring only a 4 5/8 in. stroker crank with no machine work to existing crankcases.

Features

• 4.320 in. bore for 136 cubic inches
• Requires S&S 4 5/8 in. stroker crank (part #ssc320-0605)
• Works with stock crankcases — no machine work needed
• Retains stock engine height
• MLS multi-layered steel head gaskets included
• Powder coat finish matches factory
• Includes 136 cu. in. cam cover badge
• Made in USA

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 910-0850A
• Displacement: 136 cubic inches
• Bore: 4.320 in.
• Weight: 29.75 lb
• Category: Engine Components / Piston Sets - Powersports
• Country of Origin: USA

Fitment

Fits Harley-Davidson models equipped with S&S 4 5/8 in. stroker crankshaft (part #ssc320-0605). Stock crankcases are compatible without modification.

Frequently Asked Questions

Do I need to machine my crankcases for this kit?

No — the kit works with stock Harley crankcases. You only need the S&S stroker crank listed above.

What crank do I need for this cylinder and piston kit?

This kit requires the S&S 4 5/8 in. stroker crank, part #ssc320-0605. It will not work with stock-stroke cranks.

Will this change my engine height?

No — the kit retains stock engine height despite the larger displacement.

What's included in the box?

Cylinder, piston, MLS head gaskets, and 136 cu. in. cam cover badge. The stroker crank is sold separately.

How much power does a 136 cubic inch kit make?

Power output depends on your entire engine package, fuel tuning, and other modifications. Consult S&S Cycle for dyno estimates with your specific setup.