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This head is for large bore power w/ a 63cc combustion chamber We put these on top of a stock 5.7 bottom end with 50k miles. Dyno results produce 700 hp plus on pump gas
Requires 4″ bore minimum and ls3 intake rocker. There was a valve shortage Shop the best available promaxx xxtreme gm ls aluminum cylinder heads parts at the guaranteed lowest prices
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Browse for more products in the same category as this item Cylinder heads > promaxx cylinder heads > chevrolet _ ls series Promaxx 3165 xxtreme 260 ls3 rectangle large bore 59cc bare heads fits vehicle This head is for large bore power
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. Liberty or promaxx ls3 heads jump to latest 26k views 35 replies 10 participants last post by 58446 nov 12, 2022 ls3fox discussion starter Promaxx performance xxtreme assembled 260 cc rectangle port cylinder heads for ls3 w/4 in
Bore w/63 cc combustion chambers is rated 5.0 out of 5 by 1
Rated 5 out of 5 by hammer99 from incrediblei bought and waited 4 month for these heads
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