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On the stock turbo little to no gains will be made with a new catback except for noise. So following protocol with my Mazdaspeeds, I know that deleting the second cat can gain some power until you are ready to go downpipe/exhaust and bigger turbo. So those of you that have deleted the second cat, how did you do yours? Weld in, or clamp in? Any pics?
Thanks.
Thanks.
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