Tomb Posted September 15, 2013 Share Posted September 15, 2013 So at the moment i have a japspeed k2 (terrible fitting & terrible quality) but it came on the car when i bought it. My plans for the exhust is to go with a Gemini system from invidia, eventually, but for now I'm looking at decats as i have read this frees up a bit of power and will also be compatible with the Gemini system. My questions to you is there much difference between silenced and regular decats in terms or performance, obviously sound and does anyone have any clips of decats on either a k2 or Gemini system, also will the silenced cats have less 'rasp' than regular decats? Here's a little clip of how mine sounds at the moment ... Quote Link to comment Share on other sites More sharing options...
aidan Posted September 15, 2013 Share Posted September 15, 2013 Could be wrong but silenced decats (or HFC) rasp more than straight through decats - the rasping to do with the slight flow restriction. And obviously decats are louder. Quote Link to comment Share on other sites More sharing options...
Dblock Posted September 15, 2013 Share Posted September 15, 2013 Decats still rasp. If it was due to restriction the oem cats would be the raspier than decats and HFC. Quote Link to comment Share on other sites More sharing options...
Tarmac@TarmacSportz Posted September 15, 2013 Share Posted September 15, 2013 I have some decats going cheap if you want to try them out. Just drop me a pm if you want to discuss Quote Link to comment Share on other sites More sharing options...
Tomb Posted September 16, 2013 Author Share Posted September 16, 2013 Thanks for the replies guys Quote Link to comment Share on other sites More sharing options...
Yampiedog Posted September 16, 2013 Share Posted September 16, 2013 Will the 350Z pass an MOT with decats? Quote Link to comment Share on other sites More sharing options...
aidan Posted September 16, 2013 Share Posted September 16, 2013 (edited) Nope....very unlikely. Some even fail with HFCs. Fitting is a bit of a pain, but once you do it once , no big deal. Takes about an hour (with coffee) to change them over. When I sell I'll offer the new owner either having the decats fitted or cats back on. Its not that difficult. Edited September 16, 2013 by aidan Quote Link to comment Share on other sites More sharing options...
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