The XXTREME Series is our newest line performance cylinder head. It features professionally designed runners and chambers meticulously designed in the U.S.A. At PROMAXX, we provide our XXTREME series at prices that make our competition cringe. Going fast doesn’t have to break the bank, so get a pair of XXTREME Series Heads today. Take your performance to the XXTREME!

All performance series heads sold in pairs!