C230 Sport Coup

I'm having a weird problem with my exhaust system.
When I drive up a long hill, like for a few miles heading up into the hills,
the exhaust system heats up and starts to make a horrendous noise.

Anyone know a good shop for exhaust work in the Bay Area?
I went to one shop after the header dropped down (2 piece) and was dragging on the ground.
The weld supporting the exhaust broke
So I had it towed to these **** clowns in Campbell, who apparently in the process of putting it on the lift did this, bent the whole exhaust system under the car, and then charged me $250 to fix the mistake they made, when all that was needed was a small tack weld on a bracket.
The 02 sensor was also f'd, which I've since replaced.




My exhaust is a hacked up mess, what with the header, universal cats, resonator, and Remus muffler, and I'd like to perhaps start fresh with an entirely new exhaust and put the stock muffler, a new magnaflow cat (or stock but where am I gonna find that for less than a grand? ) and stock manifold back in, and use someone who doesn't look at me with a blank stare when I ask if they use "mandrel bends". The last cat I put while approved by the state is "Walker" brand, and I have a bad feeling about it.
Seems to really create a lot of back pressure.

Suggestions please? Also if anyone has a complete exhaust system laying around for an02 coupey, unmolested, I'd take it off your hands.

Blackbradpitt

Any chance you're ever up in Sacramento?