litlez302

Gonna do a heads and a cam on my 2011 grandsport 6spd. Wondering if i should port my ls3 heads or buy new also what cam. Car currently has a vortech si oil fed with ecs meth setup.

Slo-Poc

Save the money from the heads and grab a solid clutch. do a nice blower cam, pulley down to at least a 3.6. Should put you some where in the 675+ range.

0Presence Dist.

^^^agreed..

old motorhead

Stock LS3 heads won't hold you back unless you're trying to get every last bit of power out of your build. A mid 220's blower cam, long tube headers, meth, and single digit boost will get you close to, if not over, 700 rwhp. If you want more, up the boost a little