Thread: Z/28 Heads
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Old 01-13-2015, 08:14 PM   #11
MARKSTI
 
Drives: 2015 z28 sold
Join Date: Dec 2014
Location: As
Posts: 80
FYI HENNESSEY claims that the z28 ls7 heads are revised and not gonna fail stock...the only one i have heard to say this.
However the engine package they sell (600 hp/actually 630hp) includes worked over clyinder heads...hehe
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