Bent exhaust flanges...

Not sure this is an approved method, but if it were me, I'd try coating the correct gaskets with high temperature RTV silicone. I think there is a copper color material that is rated to withstand exhaust temperatures. Then let it cure thoroughly before use. You might also try using two gaskets on each one, cutting off the ends to provide extra thickness at the center, but I'd probably try just the sealant first. It seems to do a fairly good job of filling voids, but also can be easily removed. If your first trial does not work, perhaps you could then use a bit of extra material so a very small amount oozes out into the pipe forming a "key" to help hold the sealant in place, but this may not be necessary. I seem to remember using this type of material on an cast iron exhaust manifold gasket when after finishing the installation of a rebuilt aluminum head, I discovered the last hole on the end had threads that were stripped. Was a long time ago, and I still drive the truck, far as I know, it is still working OK.

You cannot correct this with anything short of new replacement flanges. Any attempted repair will be extremely short-lived. Stacks of two or three or four gaskets, RTV silicone, attempts to bend back the flange -- none of these will get the job done for any length of time.

DS

Depends on what the flanges are made from. If they're cast iron, then you're out of luck. Chances are they will break while attempting to straighten them. If they're steel plate or sheet, then you can bend them back with careful taps with a hammer. Remember, don't beat on the side that has the catalytic converter nearby, it's likely you'll break the catalyst substrate if it's the monolithic style.

JazzMan

Forgot to mention, the car's a 98 Corvette... the flanges look like steel, however they are rather thick. Alot thicker then the flanges I'm used to seeing on my old import cars. Hmmm.... Im gonna try one thing, I figure I ccant make it any worse then it already is- stack some washers where the bolts are, and then use C clamps to attempt to bend back the metal.