Imagination Posted September 22, 2014 Share Posted September 22, 2014 Hi, I just removed precat from up pipe on friends Subaru Bugeye 2.0 2k, now it have terrible bangin sound on low rpm. I kept original pipe just pulled precat out as it was blockin turbo periodically. Any solutions ? Is there anyone using decat up pipe from eBay? Quote Link to comment Share on other sites More sharing options...
stants Posted September 22, 2014 Share Posted September 22, 2014 Can you get a clip of the sound ? No idea as to the cause but if you post up sound maybe someone will be able to pinpoint it Quote Link to comment Share on other sites More sharing options...
Gaulson Posted September 22, 2014 Share Posted September 22, 2014 Could be just the unburnt fuel igniting in the exhaust. Mine pops when I change down gears or just rev it a bit. Quote Link to comment Share on other sites More sharing options...
Imagination Posted September 22, 2014 Author Share Posted September 22, 2014 Will post sound tomorrow with video, I mean so it just because nothing blocks gases now, so it is expanding in tube and doing bang, If anyone have stainless flexible decat pipe fitted and have good sound it will be good to know, ecu is still untoched, so it might be fuel as well. But on higher rpm sounds good. Up pipe is still sane, I just pulled cat out Quote Link to comment Share on other sites More sharing options...
salsa-king Posted September 23, 2014 Share Posted September 23, 2014 de catin' shouldn't give a 'funny' noise, was it there before and it wasn't noticed? Quote Link to comment Share on other sites More sharing options...
Imagination Posted September 23, 2014 Author Share Posted September 23, 2014 all cats was removed, it was huge downpipe and rest of exhaust fitted, that noise started after pulling pre cat out of pipe, but pipe itself was not swapped. I'm not soure if decat up pipe is worth of trying, but if nothing else, there's that metal hose at the middle, later today I will post video Quote Link to comment Share on other sites More sharing options...
Imagination Posted September 23, 2014 Author Share Posted September 23, 2014 http://www.japspeed.co.uk/subaru-impreza-decat-turbo-up-pipe.html Is this worth of trying? Quote Link to comment Share on other sites More sharing options...
quit Posted September 23, 2014 Share Posted September 23, 2014 Is it a cheap pipe ? Might be blowing Quote Link to comment Share on other sites More sharing options...
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