Harley-Davidson Automatic Compression Release 28861-07A


Harley-Davidson Automatic Compression Release

Sale price$71.09 Regular price$83.64
Sold out
Or 4 interest free payments of $17.77 AUD with Or Zip it from $10/week with
SKU: 28861-07A

Pickup is available from these stores, usually ready in 24 hours.

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-later Twin Cam equipped models. Can be used with Original Equipment or Screamin' Eagle® Cylinder Heads. Does not fit with Twin-Cooled engines.


Can't find what you're looking for? Let us know!


Cant find what you're looking for?

Lets us know and we can provide you with all the details