supra matt Posted May 31, 2007 Share Posted May 31, 2007 http://www.fpuk.co.uk/magnaflow/performancecats.html Hi all I'm thinking about fitting one of these street/race cats to my single supra , But how restrictive are they? And been a high flow cat will it still pass the mot if i fight it? Link to comment Share on other sites More sharing options...
trooper Posted June 1, 2007 Share Posted June 1, 2007 I've heard of these too but I can't answer any of your questions sorry!!!!! I face hassle every coz of bloody emissions and this could be a solution, maybe. Link to comment Share on other sites More sharing options...
Ark Posted June 1, 2007 Share Posted June 1, 2007 A 200 CPI (cells per inch??) cat will be half as restrictive as a stock cat, plus you can get them in a 3" bore, which is about twice as wide as stock...so maybe a quarter as restrictive as stock then. I'm sure that someone will come along and shoot holes in that though, just to prove a point. Link to comment Share on other sites More sharing options...
AndrewOW Posted June 1, 2007 Share Posted June 1, 2007 I asked my garage about these a while ago, and they said its cheaper just to put your 2nd cat back in for the MOT, and take it off again each time, than spending £250 on one of these. Then again, I wouldn't mind having a slightly greener emissions overall, so I may consider one of these eventually! After saying all that, I believe they are @95% efficient. Reasonable compromise really. Surprised they aren't fitted as standard to performance cars. Link to comment Share on other sites More sharing options...
Nic Posted June 1, 2007 Share Posted June 1, 2007 Weds do a Supra specific sport cat, see here http://www.weds.co.jp/products/gt/revcatalyzer.html Link to comment Share on other sites More sharing options...
AndrewOW Posted June 1, 2007 Share Posted June 1, 2007 Weds do a Supra specific sport cat, see here http://www.weds.co.jp/products/gt/revcatalyzer.html Sorry Nic, for some reason I don't understand the lingo?! How much are they delivered? I've got a BPU TT auto. Link to comment Share on other sites More sharing options...
SupraPL Posted June 1, 2007 Share Posted June 1, 2007 Weds do a Supra specific sport cat, see here http://www.weds.co.jp/products/gt/revcatalyzer.html Is it the same "quiet" as stock second cat? I want to do full decat but my exhaust will be extremely loud so i need decat pipe wit silencer/resonator or maybe sport cat... Link to comment Share on other sites More sharing options...
SMiFFAD Posted June 1, 2007 Share Posted June 1, 2007 Wouldnt mind knowing a price on these, i dont have the cats for mine so would be handy to fit and forget! Link to comment Share on other sites More sharing options...
supra matt Posted June 1, 2007 Author Share Posted June 1, 2007 That's good Nic but no good for me as i have the phr stage 2 single turbo and it has it's own down and mid section which is 3" and the connections are v band , So i need a universal cat like the one in my link . Do you no any one else that do them? Weds do a Supra specific sport cat, see here http://www.weds.co.jp/products/gt/revcatalyzer.html Link to comment Share on other sites More sharing options...
Kranz Posted June 1, 2007 Share Posted June 1, 2007 AFAIK the Supra cat is a ceramic brick, and these Street Racer sports cats are metal substrate. The metal is much thinner section than the ceramic, so provides less surface area to block the flow. Also the number of cells per inch (CPI) is lower, so there is again less restriction. If they have a high loading of active metals then they'll do the job of passing the MOT and absorb less power then the stock cat. A pair of 3" in parallel would be best at it would offer virtually no loss over a decat pipe. Link to comment Share on other sites More sharing options...
RobSheffield Posted June 1, 2007 Share Posted June 1, 2007 What about having a stock 2nd cat to put in at MOT time? Link to comment Share on other sites More sharing options...
supra matt Posted June 1, 2007 Author Share Posted June 1, 2007 Thanks think ill get one , there's no room to put two in parallel tho , So the higher the CPI number the less restrictive;) AFAIK the Supra cat is a ceramic brick, and these Street Racer sports cats are metal substrate. The metal is much thinner section than the ceramic, so provides less surface area to block the flow. Also the number of cells per inch (CPI) is lower, so there is again less restriction. If they have a high loading of active metals then they'll do the job of passing the MOT and absorb less power then the stock cat. A pair of 3" in parallel would be best at it would offer virtually no loss over a decat pipe. Link to comment Share on other sites More sharing options...
supra matt Posted June 1, 2007 Author Share Posted June 1, 2007 What about having a stock 2nd cat to put in at MOT time? wont fit phr mid pipe is v band to:( Link to comment Share on other sites More sharing options...
OnionMan Posted June 2, 2007 Share Posted June 2, 2007 Weds do a Supra specific sport cat, see here http://www.weds.co.jp/products/gt/revcatalyzer.html I too would be interested in one of these, can you get hold of them? Link to comment Share on other sites More sharing options...
Ark Posted June 2, 2007 Share Posted June 2, 2007 Thanks think ill get one , there's no room to put two in parallel tho , So the higher the CPI number the less restrictive;) No, you want LOWER CPI - fewer cells per square inch means less stuff in the path of the gas flow. Link to comment Share on other sites More sharing options...
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