Akerly & Childs 4.060" Xtreme Piston Ring Compressor H771001XL eliminating the bypass found in

eliminating the bypass found in OE adapter and providing 1/2" NPT inlet and outlet ports for connecting an external oil cooler

light trucks and SUVs

Programmable LED is 87% larger than original AEM gauges

Swivel head positions the 2-3/4" diameter gauge for easy viewing

Akerly & Childs 4.060" Xtreme Piston Ring Compressor H771001XL eliminating the bypass found inPiston installation is as important a procedure as any other during engine assembly. That is why Akerly & Childs Xtreme ring compressors are manufactured with the engine builder in mind. All compressors are machined with a step at the bottom to clear block o rings when used. Xtreme compressors are manufactured from aircraft quality 6061T6 heat treated aluminum and then hard anodized for long life. Akerly & Childs over 50 years experience in racing