Louder? Old or New???
I have 99 T/A with mods in sig and it is pretty loud. My dad has a 79 T/A with the 400 Pontiac motor, 4 speed, Black, Gold Firebird on hood, etc., and long tube headers. He had OLD Flowmasters on it, I mean like 20 years old, he got them put on in the early 80s. Problem is he had them reuse the 2.25 inch stock piping and later he put on an H pipe. We just ordered a 2.5 in X pipe with (2) 12" DynoMax Bullet mufflers. We will the exhaust shop fabricate the rest of the exhaust from the LTs to the tips (we will reuse the stock turndown double tips). Will his be louder than mine? It's my setup: LS1 with shorties, 2.5 y pipe (with cats), and TSP Rumbler, which uses I think (1) 18" DynoMax bullet muffler Vs. 400 Pontiac big block, with cam, LTs, true 2.5" duals, X pipe, (2) bullet mufflers, and out the stock tips.