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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.

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Automatic Compression Release
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' Eagle Performance cylinder heads for all '07-later Twin Cam equipped models
Install requires machining to be performed by a competent machinist using the Screamin' Eagle 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' Eagle Cylinder Heads. Does not fit with Twin-Cooled engines.

WARRANTY: 1 year limited warranty – Go to www.h-d.com/warranty for full details
These Screamin’ Eagle® 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 Screamin’ Eagle Accessories catalog for fitment information. Screamin’ Eagle Performance products are intended for the experienced rider only.
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      Harley-Davidson® Credit Card*

      Fund your freedom with the UK’s only credit card designed specifically for Harley® enthusiasts.

      * Harley-Davidson® Credit Card is a credit product introduced by Harley Davidson Financial Services Europe Limited and provided by Tymit Limited. Tymit Limited is authorised and regulated by the Financial Conduct Authority to perform regulated Consumer Credit activities (FRN:796994) as a lender. [Harley Davidson Financial Services Europe Limited] is an Introducer Appointed Representative of Tymit Limited for the Harley-Davidson® Credit Card products. This link, image, and content related to it is owned and operated by Harley-Davidson Financial Services Europe Limited, as an IAR of Tymit, Ltd. Harley-Davidson Motor Company has no legal interest or ownership in any of the above.