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Automatic Compression Release

Part Number: 28861-07A

Automatic Compression Release (ACR) valves reduce the strain of starting your high performance motor by reducing cylinder compression - automatically! The engine is easier to turn over resulting in less wear on your starter and battery. After start, the ACR valves close to restore full compression.

  • ACR can be installed on stock or Screamin' Eagleยฎ Performance cylinder heads for all '07-later Twin Cam equipped models

  • Install requires machining to be performed by a competent machinist using the Screamin' Eagleยฎ Automatic Compression Release Fixture Kit P/N 94648-08 (sold separately)

  • Installation requires separate purchase of model specific ACR Wiring Harness

Fits '07-'17 Twin Cam-equipped models. Can be used with Original Equipment or Screamin' Eagleยฎ Cylinder Heads. Does not fit with Twin-Cooled engines.

Sold In Units:

Each

In the Box:

Valve only

WARRANTY:

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These Screaminโ€™ Eagleยฎ products are 50-State U.S. EPA compliant for sale and use on all applicable vehicles, including those that are pollution controlled. See Genuine Motor Parts and Accessories or Screaminโ€™ Eagle Accessories catalog for fitment information. Screaminโ€™ Eagle Performance products are intended for the experienced rider only.