Is a catback a driveway job?
If you take it to an exhaust shop, you won't pay more than an hour's worth of labor to install it. If you do it in the driveway, you'll spend easily twice as long, probably not get it to line up properly and take it to an exhaust shop to get tweaked anyway. If you're really lucky, you'll get it to line up perfectly and save $65 at the expense of an hour or two extra of your time.
Keep it all in perspective. On my old Firebird, I took it to an exhaust shop to put a catback on because it took half an hour and cost me $30. It would have taken me forever in a driveway.
See how much a shop will cost for a catback install. If they only charge $30 or $40, you're much better off going to the shop because it'll line up perfectly the first time and save you hours of your time.
I bought this car with the Corsa on it, and I have a feeling the idiot that installed it did it in his driveway. The tips were sagging and not lined up at all. One of the tailpipes was in the muffler by 1/2". The I-pipe was a quarter inch from the driveshaft causing a horrible rubbing sound in reverse and idling, making me think I had a Corsa with a loose baffle. It was a nightmarish install whoever did it. When I put the headers in, I took it to a shop and it was reinstalled the right way - on a lift where you can see what you're doing. The tailpipes were readjusted, clearance was adjusted, etc. Now I have no rubbing, no banging, the tips line up perfectly, they aren't sagging and the tailpipes are actually in the muffler now.
See how much a shop will cost for a catback install. If they only charge $30 or $40, you're much better off going to the shop because it'll line up perfectly the first time and save you hours of your time.
I ultimately did it myself - Ypipe and all. It was a snap with no issues. It all lined up perfect.

I like the magnaflow but I hate the factory Y pipe. like to find complete system for convertible that is from the CAT flange to tailpipe, little lounder than stock but not too loud as to attract cops
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