why not do it . if u have the time and money go nuts .

I realize I am play devils advocate here (so don't think I am trying to put your fire out), but here's my pitch for 321 stainless.

18-20 Gauge T321 stainless is your best bet.

1. It will resist corrosion.
2. Readily available bends, mandrel type stuff.
3. Easy to weld in comparison to aluminum unless your a wiz welder
4. The last point is theory, but, where 321 stainless is staying strong in the high temps, aluminum would start to be getting soft right? At least I would think so...

Lastly, if your going to do this for realz, let us know how it turns out!

im not denouncing free thought herer or shunning creativity i just think the time and effort can be better spent on something with some more importance than shaving a couple ounces on an exhaust... which if im not correct was his main reason for using aluminum

if he really wants to save weight theres much easier and practical ways of doing soo agian just my 2 cents

one of my buddys did it, been a year now works perfect

the question is what kind of car would he be doing it for. N/A or turbo. I think thats a little more important because of the exhaust temp difference.

also if he wants to do it then let him. as previously stated if he has the resources and time let him go apeshit.

I would drill ninja holes in the chassis first. :)

it wouldnt save much weight at all

I though this thread was dead, but then it came back like Arnold Schwarzenegger!

I think they are doing it because it's JDM. :eek:

Aluminum piping sux it doesnt deaden the sound. also the pitch sounds bad not to mention it will bend alot easier my buddy has it i think it's horrible. bringing back the dead on this thread;D