5.3L heads
06-15-2010, 02:00 PM
#2
Stock unported 5.3L heads will give you a slight bump in compression, but they don't flow that great out of the box so I would not go through the work involed in swapping to them unless you had them ported first!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
