Designed for entry-level street performance engines and ideal for operating in the idle to 5500 rpm range. Includes hardened spring cups and Heli-Coil® threaded inserts in the rocker stud bosses for increased strength; these are the details that most low-cost competitors leave out of their heads. These heads are sold separately and Made in the USA!
Designed for entry-level street performance engines and ideal for operating in the idle to 5500 rpm range. Includes hardened spring cups and Heli-Coil® threaded inserts in the rocker stud bosses for increased strength; these are the details that most low-cost competitors leave out of their heads. These heads are sold separately and Made in the USA!