I was wondering if it was a good idea to go true dual and dump the exhaust right under the seat pans?, I have shorty headers, mistake now that I think about it, but would it be a good idea to drop the cats, put a small intermediate pipe in, then maybe into a bullet style muffler and dump it right after? I dont really understand back pressure, some say its essential, some say dont even worry about it. Maybe I could even run some pipe out to the side of the car and end it right at the rear wheel well? any suggestions would be helpful!

It'll work, but the noise may be unbearable. I had a single bullet muffler dumping under the car, problem is it resonates badly. Sound bounces off the ground and back into the body. Causes a lot of vibration noise too, rattles every peice of plastic inside.

haha my cutout does that already so i figure what the hell...

If it dumps in the right spot it should be fine. Mine dumps way to far foward & all I get is fumes at the stoplight with windows down or t's off. I personally like the full pipes exiting out the back as far as looks go.

Hmmmm...well, back pressure is really only needed for proper functioning of the EGR valve. The more stuff comes into the engine and more stuff that can get out means more hp. However, GM has done a lot of experiments on this and has found that ideally, you want a 2.5 inch intermediate pipe dumping into a single 3 inch pipe about 5 ft long. That developes the best hp--take a look at how Borla designs their stuff--it works perfectly and the design is based on GM's engineering theories. Then again, so are about 99% of the NASCAR exhausts---see that single pipe coming out just ahead of the rear wheel on the right hand side?

If you hear and FEEL the exhaust, just do what I did--line the entire passenger compartment with Dynamat or the lighter Tsunami Sound Deadener--both are excellent. that way, you don't have to listen to the noises except for really good tunes, but everyone else will. Ha! That's what I used to tell them, anyway.

All of what has been said is great advice but I've got a little bit more to add. Before you go to the expense of doing true duals dumping where you're thinking of having them come out you might want to check your local laws. In some states it's illegal to have the exhaust come out anywhere but the rear of the car or in a spot other then where it comes out from the factory. Plus if you've got emissions or safety inspections in your area you more then likely will fail with them dumping where you're thinking.

Just figured I'd warn you since it seems our cars are cop magnets even when they're stock and even more so once you start doing mods and especially when you put on louder exhaust.

down here in good ole clayton nc, the cops appreciate a good sound i think, at least they nod in approval as they drive by when im cruising, i like the ideas though and thanks for that advice on the laws, but i dont thinki they mind since some of these good ole boys here like their trucks running straight pipes or holes drilled in their mufflers hahaha...