difference between prc heads???
difference between prc heads??? so whats the difference between PRC stage 1 and stage 2.5 cylinder heads, besides the valves??? the ls6 heads, not the 5.3's.
if you do know the difference, which do you think would be the best for FI??
if you do know the difference, which do you think would be the best for FI??
The main differences are the valves and springs. The stage 1 heads come with stock valves and springs with the option of a spring upgrade. You would have to contact TSP to verify but I believe at one time the stage 1 heads did not have a CNC'ed combustion chamber either. Personally I would go for the stage 2.5's with the larger stainless valves and the dual springs. It's worth the extra money.
The Stage 2.5's have the larger valves, and a VERY slightly larger runner volume as well (we're talking 1-2cc here.) The chambers on the LS6 as well as 6.0L heads are untouched to keep the chamber sizes down and keep your compression up where it needs to be for a cleaner/better burn!
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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!
