I got the whole flowmaster 2-chamber kit plus MAc h-pipe about 2 years ago. I did NOT weld ANY of it. I have had no leaks. If you weld it and then need to work on transmission or replace the clutch or any thing up under there you have to brake the weld to remove the pipes and you have a very good chance of ruining the pipes. I did mine with a jack and two jack stands and some wrenches.
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2003 Sonic Blue Cobra
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