After spending the 900 bucks(700 plus 200 shipping) to get my GMMG exhaust sent to me, I felt it might have been a bad idea and should have gone with something else. But that feeling changed the moment I started her up after installing it. I love it's deep throaty sound and many other people have been praising it as well. I took her to the track again, and folks(mainly LS1 owners) were asking what I was running, which my best is still 14.2! I did many a run that night, and my best was 14.3 but I was at a full tank. I came back with a quarter tank next week and pulled a 14.4 at my first and only run, but I had massive burn out in the first 60 feet, so I will try going again with a quarter and seeing what I pull. Anyhow, some of the LS1 owners, who regularly pull high to low 13s recommended racing slicks, but I want to keep my car mostly street, and feel the cost of racing slicks could go towards a diff mod. Right now I'm considering Kooks headers, seeing how people on the boards talk about them. But after I do that, would I have to get my cylinders bored out. Not too technically inclined, but wouldn't that be the final missing piece of the puzzle to increase airflow? CAI to Bored Cylinders to bigger headers to new less restrictive exhaust, right? Also, I was looking at a post by Vendetta regarding these LE1-3 kits, can anyone give a better description about how that works? I went to the site, and it's waaay too technical for me, but the price seems right, I'm about to move to Virginia at the end of this year, so I will probably wait till I move to do that mod. Any thoughts or assistance appreciated

 

Boring out the cylinders is done mainly to clean up the cylinder walls and get them true again. Yes it does add cubic inches but not much, so if it were me, unless the car has mega miles on it or it has alot of blowby or it's smoking I wouldn't worry about boring it out right now. You already have CAI and exhaust so if it's a daily driver and you wanna stay bolt on only then I would get some LT headers, a good tune and if you really wanna see what the car will do in the 1/4 then get some street slicks. Watch out though, I see yer an M6 and an M6 plus 10 bolt rear plus slicks don't mix very well. I broke my rearend last weekend due to that but damn was it hookin up.