I'm using TTI's 1-7/8'' LA headers on my w2 heads. I want to buy TTI 1-7/8'' w2 headers but I don't have the wide spread bolt pattern. I would have to buy the 1-5/8''to 1-3/4'' step header.

will I lose power with the smaller tube? TTI recommends the step headers to 550 hp and I have over 650 hp.