First, I did a search on this subject and nothing came up, second, I don't have 700.00 for TTI's.( I've already dumped 30K into this beast) What else fits on COLUMN shift autos brand wise. I have an existing pipe and muffler set up that is 2 1/2" before the Walker Super Hemi Turbo's from Summit and 2" tailpipes with CA turndowns. I can always change that later. Would it even be worth it to swap the Hi-po exhaust manifolds out for headers HP wise? Are shorty headers any good on these engines. The specs are 40 over 440 with stock pistons, 906's, Schneider 270H cam TQ carb, 727 GVOD, 3:91 SG. Car runs 15's if I'm lucky. Thanks