TTI does have it listed in the description of the headers.....15/8" 320-575 hp, 1 7/8" for 550+......seems like a no brainer at 500 hp....if that is truly what you have....
ya i seen that on the their website. I was just looking for input and reviews. I may put a bottle on it in the future so just looking for a happy medium. Appreciate you pointing out the obvious for me though.
