Less than a year into owning the car I decided to add headers. I ended up getting a used set of 1 ¾” KOOKS from ADM Performance. Someone else started with 1 ¾” and then upgraded to 2”. His loss was my gain. I got smoking deal from Andy for the headers, new HF cats, 3” Magnaflow cat-back, installation, and a tune. I had the headers sent off for ceramic coating prior to install. That was worth every penny to make them look brand new.
My initial dyno pull put 373 rwhp. After headers and a tune I got 411 rwhp. That’s only a few less HP than what most 1 7/8” setups typically put down on his dyno. Keep in mind for the pre-dyno I had an intake and a rear-cat delete which is why my numbers were a littler higher than normal.
I ended up selling my muffler delete exhaust to a member with a 2LT. I ended get pretty much all the money I spent on it but I also installed it for him.
2SS | M6 | VR w/White Stripes | 1 3/4" KOOKS - 3" Magnaflow | LPE 3.91 gears | ADM tuned | Halltech w/ADM Scoop | Spohn/BMR Trailing Arm/Toe Rod | BC Coilovers| Pedders FE4 ZL1 swaybars | Cradle/Diff/Radius Rod bushings | VMax TB | Morimoto Projectors | MGW shifter | Red Calipers
Last edited by caverman; 12-17-2012 at 11:29 AM.