PROMAXX Performance Products

nissan stock replacement

ford emplacement head

cummins replacement head

Shocker 225 SBC CNC
(Sold in Pairs)
$1,190.00 – $1,655.00 Select options

Maxx 183 SBC
(Sold in Pairs)
$693.00 – $1,125.00 Select options

Series One 175 SBF
(Sold in Pairs)
$735.00 – $1,175.00 Select options

Series
One

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

best cylinder head

MAXX
Series

Taking the affordable performance cylinder head to the next level.

performance cylinder head

Shocker
Series

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

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