WR Sport backbox

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30 March 2006, 12:57 PM

cuttsysti

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WR Sport backbox

I have recently swapped my WRX for an STI. On the old car I had the WR Sport backbox, which I kept when I sold it. Will fitting it to the STI increase BHP at all?

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30 March 2006, 01:27 PM

JohnD

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The WR Sport box is the same as the PPP box but with an oval tailpipe. You won't get much power increase, possibly a few extra bhp at the higher revs, with this alone, but it'll sound much nicer.
JohnD