Hey guys, I was just wondering, my car is making 327 rwhp and 343 ft lbs torque and had it tuned once before. I just bought American Racing headers with a catted y pipe and an Slp underdrive pulley. I'm just wondering how much power you guys think I would gain from these mods? My guess would be about 350, but I'm hoping for more.

My current mods are: ls6 intake, slp flow pack, loudmouth 1, ws6 store short stick, brimbo blanks with hawk hbs 327 343 m6. Thanks.