VTISmichael Posted January 30, 2012 Share Posted January 30, 2012 just seen a de-cat that said it adds 10-15bhp, its one with a bigger diameter bulge (A) instead of a just a parallel piece of straight pipe (, does it really make that differance ?AB Quote Link to comment Share on other sites More sharing options...
johngreen537 Posted January 30, 2012 Share Posted January 30, 2012 Noticeably revs more freely.Not convinced on the 15bhp, but will make a good difference! Quote Link to comment Share on other sites More sharing options...
9200rpm Posted January 30, 2012 Share Posted January 30, 2012 hi mate if you get it let us know if it makes a difference every bit helps Quote Link to comment Share on other sites More sharing options...
VTISmichael Posted January 30, 2012 Author Share Posted January 30, 2012 oh i will but i have a sort of a problem too, i measured my current sports cat and its 430mm long and all the de-cats i can find are 410mm or either 415mm long soo some bodging will be needed. i think the last owner put a import system on it... Quote Link to comment Share on other sites More sharing options...
9200rpm Posted January 30, 2012 Share Posted January 30, 2012 could always extend a peice of middle system while your under there Quote Link to comment Share on other sites More sharing options...
VTISmichael Posted January 30, 2012 Author Share Posted January 30, 2012 id rather not mess about with the system, even tho its an import its quite well made, im watching a de-cat on ebay atm and with a bit of moddin it will fit but just wanted to if anyone knew if the bulgy one actually improved power.. Quote Link to comment Share on other sites More sharing options...
philgor Posted January 30, 2012 Share Posted January 30, 2012 what the bulge'd de-cat might be for is, the MOT test, http://www.civic5.com/forum/viewtopic.php?f=14&t=8973&p=95686#p95686, a load of new failure's came in on the 01/01/12 and some more in spring. .New RfR where a catalytic converters are not fitted to vehicles subject to a full cat test. if it came from the factory with a cat it need's one for mot, doesn't matter if it passes the cat test or noti think the idea of the bulge, is to fool the tester in to thinking that the cat is present, and that it is not a de-cat. Quote Link to comment Share on other sites More sharing options...
WilkesyMB6 Posted January 30, 2012 Share Posted January 30, 2012 My de-cat looks like the first one pictured. I dont think it makes a difference to performance. If anything i might make is more quiet? Quote Link to comment Share on other sites More sharing options...
noodels Posted January 30, 2012 Share Posted January 30, 2012 leave your sports cat on as said dont use my decat prefer cat on mine Quote Link to comment Share on other sites More sharing options...
VTISmichael Posted January 30, 2012 Author Share Posted January 30, 2012 i see what u mean about the cat but simple fact is even tho it does look like it could be a cat it wont pass the emissons test and like my previous cars i wouldnt even bother trying to get it thru with it on, it is quiet and nice but i miss having some sound out the back not that the vtec isnt enough, i just want some lower end pleasure out of it when i pull away.But all the sellers say it gives 10-15bhp and even well known makes say that so there must something to it.. Quote Link to comment Share on other sites More sharing options...
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