RedWS601

iTrader: (1)

I put on my Magnaflow catback about two months and it has had a leak ever since. Bought band clamps and had them done by a mechanic but still a leak. Thanks to that leak my cat is gone well at least I think only one. My ? is should I get everything welded from header collector to the muffler? anything that I should worry about if I do that?

Deamon2002

iTrader: (3)

Nothing to worry about, can make it a little harder to du mods under there, but not by much. Like if you wanted to drop the fuel tank or something with the transmission you would have to ge tthe exhaust removed first. Other than that it will surely seal up all your leaks.

Krab

iTrader: (28)

Personally, I wouldn't weld up all the exhaust simply because it would make working on your car that much more difficult. What kind of band clamps did you get? The stainless ones that wrap around the pipe (about 3" wide)? If you get those tight enough, you shouldn't have leaks. Just be sure to put some muscle on it when you're tightening the bolts/nuts on the band clamps.

Deamon2002

iTrader: (3)

Or you could try some RTV sealant on the pipe under the band clamps.

Violatorno1

iTrader: (3)

Pull it apart and use Red RTV sealant on all the joints. Get the band clamps like the ones supplied with the Borla system. You can see them on Borla's site, maybe even get them from there. They seem to be the best band clamps I've have seen or used.

BOONE

iTrader: (4)

I would get some flanges and gaskets and weld it up. You can still remove it and it wont leak. I would not use clamps at all. Just get good gaskets if you do use flanges.

Lithium

iTrader: (47)

The only way to really stop exhaust leaks is to get it welded up. I would never do that though. The RTV should do the trick.

jimmyblue

iTrader: (11)

You might try going to Home Depot, get a roll of the
aluminum A/C duct tape and put a couple turns of that
around each joint and put the band clamps back on.
Or go to AutoZone and pay more for a smaller roll.
Tape makes the seal, clamp makes it stay.

I don't favor RTV anywhere close to O2 sensors, whether
or not the mfr claims it's "safe".

Viper

iTrader: (6)

NAPA has some awesome band clamps as well; I did those with the tape from HD and stopped the leaks.