i am building up a 406. the heads are going to be AFR 195cc's. I know there is more to it then just the head, but what kind of headers/exuast would give out the best #'s?? *remember that i need to pass emmissions as well.

i was thinking SLP 1 3/4" headers and SLP exaust. that or TES with flowmaster. lol.. or SLP headers with flows.. any other opinions?

I'd think the "i need to pass emmissions" part puts you into the SLP zone. Pick your cat, either 3" or dual, pick the headers & catback accordingly, go make some rubber smoke.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. 0.030 over 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlock header mufflers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, LT MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1/95.5 @ 5800' Bandimere.