prokilllsx

Congrats!

HCI2000SS

iTrader: (2)

That's awesome man! IIRC we have roughly the same exhaust setup. All I know is with these 5.3 heads and my Torquer V2 cam, the exhaust is just stupid loud lol

MikeWS6

Thanks, I posted the graph in the Eastern members section if you want to check it out.

BobDoLe

iTrader: (11)

so you had the LS6 intake and longtubes with that cam and just swapping from LS1 heads to the PRC heads was 48rwhp? just wanted to clarify because that is awesome!
i like my 228R cam and 2.5 5.3 heads setup also

..and i can't keep it quiet enough even with the cats and magnaflow+bullet mufflers.

MikeWS6

That is correct. I also added bigger injectors and ls7 lifters.

R6cowboy

iTrader: (3)

Nice you got more then expected. With the mods you already had done I'd say that would be around a normal gain swapping stock LS1 heads to the PRC 2.5 5.3's. Going from a 230cfm flowing head to 310cfm is a big difference. Good gains

My C5 gained 140whp/80ft lbs from stock by adding the 2.5 5.3L heads, 227/230 cam, LS2 maf, LS6 intake, headers and exhaust. They're an excellent set of heads for their cost.