HARLEY-DAVIDSON 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.

Shipping costs are calculated at checkout. Check the Supplier Direct notice above, where shown, for additional delivery information.

View shipping policy

View returns policy

Need help choosing a size or checking a part? Email weborders@joerascal.com.au. For parts enquiries, include your motorcycle model and year.