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Restrictive exhausts

   
Old Aug 15, 2007 | 08:32 PM
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flatoutscooby
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Default Restrictive exhausts
Are the newage STI or classic prodrive back boxes restrictive? My classic is fully decatted with an 06 STI standard box, nice and quiet but I'm upping the power soon and wondered if I need to change to group N etc. to reap the benefits?

Cheers

Luke
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Old Aug 15, 2007 | 10:38 PM
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You could go for a PPP backbox if you want to stay looking fairly stock.

It's possible to make at least 350bhp with the PPP backbox
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