like mentioned earlier, some muffler shops weld you mufflers on. Any good muffler shop will only clamp them on so that they can be easily changed, and you don't weld every thing because your exhaust system needs to be able to take a little bit of "twist" in it. If you weld everything your chances of blowing exhaust gaskets is greater. Just some of my previous experiances
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67 Chevy SWB - goal of a 1,000 hp weekend cruiser
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