Mystery Head?
#34
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Yeah, I'm not sure about the dyno really. My car made 376/381 on a dynojet before the Ported Throttle Body and LS6 intake. I know the dynojet reads higher, but after everything, my car only made something like 333 rwhp and 340 rwtq with a bad MAF sensor (according to the tuner). I know my car makes more than that. I ran high 12.7's @109-110 on Nittos.
#36
TECH Senior Member
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I wonder if its some type of Pre-production Head that made it on the assembely line. Check out these heads on E-Gay There suppost to be ported LS6 heads but they have a weired casting number I have never seen before. Looks like 543 or 549 cant tell. I know most castings but have never come across the ones you mentioned. Never seen the ones on E-gay before either...
http://www.performancetrucks.net/for...d.php?t=434396
http://cgi.ebay.com/ebaymotors/GM-LS...item5ad53dc15f
http://www.performancetrucks.net/for...d.php?t=434396
http://cgi.ebay.com/ebaymotors/GM-LS...item5ad53dc15f