Right now I have a stock down pipe to where the cat use to be then it increases to 5in straight pipe and out the stacks. Id like to increase the down pipe size from stock to either 4in or 5in but dont know where I can buy just the down pipe section without buying the whole system. If anyone knows where I could buy the piece let me know.
I didn't think it will fit period. The 4 inch doesn't leave a lot of room to play with.
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