Project X SBF 210
(SOLD IN PAIRS)

Project X SBC 185
(SOLD IN PAIRS)

We have taken our 100% CNC ported intake and exhaust runners and have made them into an “As-Cast” version.

Taking the affordable performance cylinder head to the next level.

Custom CNC machining makes these heads a must have for any performance

"If you need a performance racing head to work right out of the box, ProMaxx never lets you down."Kye Kelly