I'm going to buy an electronic cutout just wondering what is the size before the cat before ordering? 2.25 or 2.5 for my 2005 GP GXP
thanks
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Factory is most likely 2.25".
Aftermarket GXP exhaust is 2.5" from what I've seen.
I'd save your money...cutouts are junk.
Or be a baller and get a set of Doug Thorley Headers...catless of course.
Hogan Performance downpipes are the best in the business for the 5300 WBody.
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