[IROCanSS]

I'm sorry KMP buy there is not a snowballs chance in hell a V6 is going to pick up those kind of numbers WITHOUT exhaust, CAI and a tune. Sorry it's just not there. Let's take my car for example...

Stock-358hp sae dyno = 426hp crank so my car is losing 16%.
New HP is 408 sae dyno. Calculating CRANK HP using the 16% loss on my car bc they are all different. I am in the range of 486 HP at the crank. That's a 60 HP gain (14%).
I have intake, exhaust, headers, no cats and a tune.

Now lets take a stock V6 (and here us where we have to make some assumptions). Assuming the V6 leaves as much untapped power as the LS3 (it doesn't but we will say it does). 312 HP * 14% incease = 43 HP. You could only expect to gain AT MOST 40-45 HP At the crank with EVERYTHING. And that's at the crank. Assuming the standard 15% drivetrain loss... 45 HP * 85% = 38 wheel HP. 312*.84=262+38= 300 wheel HP. Go find out how many people have had any luck getting a V6 to 300 wheel HP. NOT MANY without major mods. Use common sense. These engines are VERY efficient. The "numbers" don't show much but the feel and response is much improved.

No way headers alone will get you what you claim. Sorry I just don't buy it. Don't believe the advertisements of other peoples number fudging.