"I bought a '99 Dakota R/T which the previous owner had installed the Spintech headers on, I've heard other trucks with the stock manifolds and the Spintech mufflers and it doesn't even compare to the sound these produce with the full exhaust system. The only thing you have to watch is exhaust gaskets, because there's twice as many bolts that you have to tighten and you can't use locking header bolts on the blocks that bolt to the cylinder heads themselves. Very easy install, can go right through the top of the engine bay if you move a few lines out of the way. "