if anyone on here has had bigger valves and port polished 5.3 head if so what size of valves and hp gains i've looked everywhere and cant get a good answer i did run across a sute where guys were just putting intake valves because exhaust valves werent bad size but dunno??
you could call West coast cylinder heads. They had all kinda of info for me.
Name: Mark,
God created turbo lag so nitrous trucks could have a chance.
http://www.ls1truck.com/forums/my-ga...tml#post274877
i run patriot stage 2 heads
Patriot Performance CNC Ported 5.3 2.02"/1.57" these are 5.3 heads 706 casting
Simple: 408 on steroids!
single digits coming soon!
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