southside Member Member 868 Member For: 15y 10m 11d Gender: Male Location: Radelaide.. Real Posted 10/02/10 12:06 AM Share Posted 10/02/10 12:06 AM hey there!ok I have a question for you all. I had my car in the other day to have my brand new Malwood option 3 clutch put in when my mate whos a high level mechanic said it wouldnt be a bad idea removing the "cat" which he said is resisting a lot of power flow and just drop in a straight pipe where the cat sits. I was wandering what your thoughts were on this option and what the side effects were? I know sound will be a factor but will I need a retune and anythng else if I drop a straight pipe in. also im currently running a 2.5" Xforce exhaust so any info will be appreciated. also any other alternatives and costing as well! cheers guys! Link to comment Share on other sites More sharing options...
tab Sucker Moderating Team 32,303 Member For: 20y 6m 19d Gender: Male Location: Brisbane Posted 10/02/10 12:13 AM Share Posted 10/02/10 12:13 AM Most obvious point is it's illegal and can attract a serious fine if you're willing to take the chance.And yeah it'll need a retune Link to comment Share on other sites More sharing options...
Wenier Donating Members 1,736 Member For: 14y 9m 26d Gender: Male Location: Christchurch, New Zealand Posted 10/02/10 01:32 AM Share Posted 10/02/10 01:32 AM Just smash the cat out then it appears to be there. Or rebuild a cat looking thing around a straight pipe, anything to make it look as if its there. Link to comment Share on other sites More sharing options...
xhxrsix Member 174 Member For: 18y 6d Gender: Male Location: Melbourne Posted 10/02/10 01:33 AM Share Posted 10/02/10 01:33 AM is there much sound difference/or advantage in having a straight through pipe instead of a bashed out cat? Link to comment Share on other sites More sharing options...
Guest XR09 Guests Posted 10/02/10 02:47 AM Share Posted 10/02/10 02:47 AM I have an interchangeable strait through on my bike. For the track. And it makes a lot of difference up in the rev's. You can here the change in note up top too. They aren't mandatory on a bike yet, if they have one on std though they have to have one. Link to comment Share on other sites More sharing options...
icer Banned 2,335 Member For: 15y 3m 27d Gender: Male Location: Aspendale, Vic. Posted 10/02/10 03:53 AM Share Posted 10/02/10 03:53 AM you get more drown / flow / power out of a gutted cat. I had one in my car but got EPA'ed. Car was 91db. 90 is legal so had to get a cat and said F**K it and leave it on. Not worth the extra efforts. Link to comment Share on other sites More sharing options...
Wenier Donating Members 1,736 Member For: 14y 9m 26d Gender: Male Location: Christchurch, New Zealand Posted 10/02/10 05:54 AM Share Posted 10/02/10 05:54 AM You probably would be best to just get a high flow cat. Only difference between a straight through pipe and properly smashed out cat is that the cat acts kinda like an expansion chamber in that section but the actual airflow between the 2 shouldnt be too different. Link to comment Share on other sites More sharing options...
BarKer Member 174 Member For: 15y 1m 26d Gender: Male Location: Newcastle Posted 10/02/10 06:17 AM Share Posted 10/02/10 06:17 AM To remove the cat or gut it you must be getting pretty desperate.. I think for road cars somethings should be sacred, cats being one of them... Link to comment Share on other sites More sharing options...
bjc Donating Members 2,823 Member For: 21y 2m 10d Gender: Male Location: Townsville Posted 10/02/10 06:45 AM Share Posted 10/02/10 06:45 AM Sacred shmacred! If your on a limited budget and want to take the chance then go for it. Its not like most of our cars pass emissions anyway and if you can poison a few earth loving pedestrians along the way then why not. Link to comment Share on other sites More sharing options...
southside Member Member 868 Member For: 15y 10m 11d Gender: Male Location: Radelaide.. Real Posted 10/02/10 07:17 AM Author Share Posted 10/02/10 07:17 AM whats the costs these days for a highflow cat to suite an xforce 2.5 system? Link to comment Share on other sites More sharing options...
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