Also its worth mentioning that to release the burble from the 2.5, you will need to change the resonated section of the exhaust (the small pipe joined to the back box that looks like its swallowed a hot water bottle!), as I tried the back box first, and while it made a bit of a difference it was the resonated section that was restricting the noise. I paid £99 for this section, so not too dear to do.
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10 Years of Scoobies:04 WRX SL, 06 HAWK STI, 97 JDM WRX STI WAGON, 05 WRX STI, MK3 FOCUS RS, now Porsche Cayman S
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