Akerly & Childs 4.125" Xtreme Piston Ring Compressor 711001 The Top Air System can

The Top Air System can be fitted onto ST5 Formula and GT models

An auxiliary air inlet and/or optional Dynamic Air Scoop (P/N:54-76005-S) can be used to bring in additional air

E85 / Gas / Diesel

Bearing / Washers Included

The exhaust port and bolt pattern are raised

Akerly & Childs 4.125" Xtreme Piston Ring Compressor 711001 The Top Air System canPiston 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