Thanks all. My WRX is a blob (05 reg), with the PPP. I've bought a Toyosports decat up pipe from someone on ebay.
It should be at around 270-280 bhp already with the PPP, shouldn't it?
I don't want hassle at MOT time so will keep whatever cats I need for that, but a decat downpipe has been suggested. Aiming for a safe 320ish, so I don't kill my gearbox or internals!
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JDM twinscroll Legacy wagon [previously blob WRX/PPP wagon, killed @ Silverstone Feb 2019]
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