KPMI Compression Releases - Release 2/PK Twin Cams — Harley-Davidson Road King, Electra Glide Ultra Classic, Softail Heritage Classic (1999-2017)

KPMI compression releases for V-twin motorcycles, sold as a pair to reduce hot-start difficulty and lower starter/battery strain. Custom-molded knobs and state-of-the-art valve design make cold starts easier on any twin-cam engine.

Features

• Reduces hot-start issues and starter load
• 5-7 Newton's closing force resistance
• Custom-molded knobs for cool touch and easy operation
• M10 x 1 thread pitch
• Sold as a pair

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-21255
• Quantity: 2 per pack
• Thread Pitch: M10 x 1
• Weight: 0.09 lbs

Fitment

Fits V-twin motorcycles with M10 x 1 threaded ports, including Harley-Davidson and Indian Motorcycle models.

Frequently Asked Questions

What do compression releases do?

They vent cylinder pressure during cold starts, reducing the force needed to turn the engine over and protecting your battery and starter.

How many are in the pack?

Two compression releases — one pair for a twin-cam engine.

Will these fit my specific Harley or Indian?

These fit any V-twin with M10 x 1 threaded ports. Cross-reference your model year to confirm your engine has this port size before ordering.

Are these hard to install?

Installation requires threading into the cylinder head ports where the stock releases were. Basic mechanical skills and hand tools are needed.