Utilizing our most advanced cylinder head design yet, this head set pumps out an extra 2.5 horsepower peak. With gains from 6 to 11 horsepower in the midrange over stock, it also packs an especially potent midrange punch. Designed to work well with stock and modified engines, this head set is compatible with 91 octane fuel. It also utilizes individual combustion chambers for service convenience and for selection of the proper compression ratio for elevation, sled configuration and desired fuel quality. Note: Jetting changes are required. Please inquire or refer to "Instructions" tab above. Not for E-TEC

 

 

 

 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov