Are you after sound or performance? "Loud" doesn't always equal "good"...
A very popular setup is a 2.5" system with the x-style crossover and Dynomax Super Turbo mufflers. Muffler testing by Jim and Tom Hand has shown that Pontiacs perform extremely well with the Super Turbos. I can't answer your question about headers but I can forward it to some people who can... Brad O. > My dad has a 1969 GTO with a 400 that has a mild cam in it. Him and I were > wondering which kinds of headers and mufflers sound real good on that car? > > Chad
