If any, what would they be?

At low speeds & idle, exhaust gas coming up inside the car.

Increased interior noise, especially if the tips are aimed down & the sound echoing up, into the car.

If you do it, I suggest taking it to the side, for a side turn-out, just before the back tire.

Yeah I figured the interior noise would come into play, but I plan on getting a relatively quiet muffler. I'm sure there's more I can I do dampen the interior sound, too. I was planning on running it to the sides and dumping at 45* with or without a tip, haven't decided yet. I was referring to performance when I asked the question, although I didn't specify that, would I lose high end, low end, or anything?

The only other thing I could think of, would be some street car classes your exhaust has to come out behid the rear axel.

long term, exhaust gases are caustic to anything that is petroleum based, so it'll rot out your bushings in the suspension...

If you have your underside and axle painted up all pretty like. its gonna coat it all with exhaust. I had my truck all painted blue underneath and it was all black in a couple months. the exhaust exited before the rear axle on it. I Found that puting turndowns angle down and out it kept most of the exhuast going out from underneath.

If you drive or park in a gravel, or dusty area (pits at the track, etc) it's gunna blow a lotta dust up. Mine have always been turned down and out before the axle, and i don't mind it...just be aware that if your beside others when you start it up, or move, they may get pissed if your blowing dust all over their junk. + side is during burnouts, it blows the tire smoke out and makes it groovy lookin! ...LOLOL

"At low speeds & idle, exhaust gas coming up inside the car."

I will second that. The possibility of carbon monoxide poisoning.

Alright well forget dumping at the rear axle then, thanks for the replies

Just turn it out to the side, not a complete dump UNDER the car.

I would but I live in an area where they don't fix potholes and manholes stick up 3"

It may tune the exhaust for an RPM higher than your powerband.

Those are Porsche tips on the bird no?

No clue....Just pics I've found.

That blue car has to loud as hell for the passenger! haha

My car is setup like the blue camaro pictured but my exhaust dumps on each side right brfore the rear tires. If you do go that route you muffler choices are limited and usally have to go with racing mufflers.

Dude to be honest I love the idea of dumping the exhaust like that. As far as fumes I havent had a problem yet and I been in bumper to bumper traffic so pretty cool. And as interior noise well its up too you I love the sound of my car and the vibration that the exhaust releases, and im runing the flowmaster 1 chamber muffler with a magna flow high flow cat and no headers.

I also have exhaust clips on my youtube. www.youtube.com/kingbikerhead check it out and let me know what you think.

And as far as performance you loose a lil in bottom end but you gain a lot on top end and trust me it feels good to smash on the pedal and actually keep on goin at higher rpm's.

I mean its up to you from where you want to take I agree with it i love so yeah.

Go to the link and you'll see pictures of the way I have the exhaust done on my car and my friends car, and the iroc is myfriends and he has 3inch pipeing.

http://viewmorepics.myspace.com/inde...albumId=758908

Tony.

Yeah about that its true about the dust and gravel flying everywhere but hey you need to sacrafice sometimes.

Tony.

The tire warmer exhaust!

A buddy of mines 70 chevelle is setup with the exhaust dumping in front of the tire. Looks and sounds great. Although there is 10x the room under his car than a 3rd gen has.

I did the dual side exhaust set up on my car and all i can say is get a good muffler i use to have a single 3" into duals out the back with two glass packs and shorty headers and it sounded good but then when i went to the side exhaust with 3" tubing and long tubes with the same glass packs it was way to loud. when i get back from school in the summer im going to change it.