The SMSP header was the new addition I was talking about. Since I put the header on, I really haven't had much to drive the car with the problems I mentioned earlier. It did make quite a difference over the DC header I dynoed with originally. The rest of my exaust is still "crunch bent" 2 1/4" tubing through a 2 1/4" cat. This was also dynoed originally. I will be changing this out as well before the next dyno session.