I'm coming up on building an exhaust for my lemon. I have (bad) ideas and want to run the exhaust out the rear and around the IRS etc so I'll need quite a bit of pipe and bends. There are plenty of builder kits on ebay for cheap like this one, and many other seemingly exact copies. I can't see it being bad, but you never know. Has anybody used a kit like this? $75 shipped to my door is cheaper than driving to and buying it near me, because I live in the middle of nowhere.
Do it!!!
I bought a $50 SS header for a Honda D series on the Bay, it's been on the car for 40K miles now, still looks great and hasn't failed yet. I am surprised because it was some kind of thin metal!
Similar kit from Amazon in 3 inch. Bought a few times. No regrets.
Aluminum dryer vent is even cheaper and doesn't need bent or welded.... 
Easy enough click to purchase!
In reply to theruleslawyer :
BTDT! With the original engine we used dryer vent for a patch once. Could never get it to seal right to the turbo downpipe. Every time the engine misfired it would puff smoke back into the engine bay.
I bought a $217 manifolds back WRX exhaust for "Colin" because weirdly nobody makes an exhaust system for a Subaru engined Mini Cooper. I treated it as a supply of 3" stainless pipe and flanges. I was able to build an exhaust system with it and a 3" U bend from Summit, and still have the entire rear muffler assembly and the (amazingly crappy) catless up pipe.
Just finished fabricating a new exhaust system on the Molvo. These 90 degree SS elbows from Amazon made life a lot easier and the results a lot more elegant. Bonus they weld like a dream. VERY handy for snaking around the tight space between the diff and the A-arms.
I bought the larger kit, four of each bend and straight for my Armada. These kits come in 16 or 18 gauge 304 or 316.
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