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How to get 4" turbo back straight pipe
I have been thinking of just doing a 4" turbo back exhaust , no muffler just straight pipe. I have an 03 so its 3.5" now with no cat to worry about. Does someone make a system like that including the downpipe? Do I need to scavenge here and there?
I just need some direction.
I had been considering a 5" system or stacks but I think 4" should be pleanty. I dont think I will ever push the HP numbers that require 5" . If I do I will upgrade.
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