supremefaulk
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Registered: 5th Feb 08
Location: Bridgend
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Hi,
I was just wondering, which is the best really!
I am looking at doing my manifolds, so might as well do the cat too, as I have a cat back system already!
Im wary of a De-Cat as they are illegal arent they? If I got pulled over by a police man with it on, would he issue me with a fine or anything?
Also, is a sports cat that much better than a normal one?
Thanks!
Kris
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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Performance wise its:
1) de cat
2) sports cat
3) regular cat
To be honest for the price Id fit a de cat, drove mine for about 3 years with it on and just had to put the cat on for the MOT. The chances of getting caught are pretty slim and even then Id say I didnt know it was illegal and take the £30 fine or whatever.
If you want to save a dolphin and sleep easy at night then get the sports cat
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Phil_b
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Registered: 31st Mar 08
Location: Wirral
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ive got a janspeed decat on and cant say i notice much difference, but maybe with more engine mods it helps, downside is my car stinks of petrol!
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luke85
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Registered: 26th Nov 07
Location: Chesterfield
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I could always notice the difference when i put the cat on for the MOT, was quite noticable
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supremefaulk
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Registered: 5th Feb 08
Location: Bridgend
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Ahh right, thats some good info, thanks guys!
I thought that a de-cat would be really obvious, as it makes the exhaust system stupidly loud?
I will have to have a think about this one then! Would like the performance of a decat, but if its gonna make my car really loud and obvious to the police, then dont really fancy it!
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Phil_b
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Registered: 31st Mar 08
Location: Wirral
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it doesnt make it much louder, mine went slightly raspy but still got a sports centre section so isnt stupidly loud. can be pretty qiet when just cruising.
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supremefaulk
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Registered: 5th Feb 08
Location: Bridgend
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ahh, I think I get it now, a straight through pipe gets rid of the center silencer and thats what makes it stupidly loud is it?
As I have a scorpion back box and middle section already fitted, and its not very loud now, so a decat and 4-2-1 manifold will mostly just change the sound of the exhaust, and make it slightly louder?
That make sense? 
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Phil_b
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Registered: 31st Mar 08
Location: Wirral
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you got it!  definately the centre section that keeps the noise down, might aswel do it every little derestriction helps 
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supremefaulk
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Registered: 5th Feb 08
Location: Bridgend
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Ahh, thats cool, emailing ebay sellers to see if any of them will cut me a deal on a manifold and de-cat now!
Also, whats the best way to make dirty stainless exhausts look good? My backbox is "stained" for lack of a better word!
Got all kinds of crud on it, that doesnt seem to want to come off!
Annoying me, as the rest of the car is gleaming thanks to my banana armour! haha
Thanks for your help 
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Phil_b
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Registered: 31st Mar 08
Location: Wirral
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no probs mate
haha i got a bargain with my janspeed decat £30 posted on ebay no1 else bidded on it so won for starting bid Go for the janspeed decat its a great price.
Ive got a 3.5 inch outward rolled stainless steel backbox and Megs all metal polish does a great job on it with some 0 grade wire wool if its really dirty. If you dont wana buy that im sure good old autosol would bring it up nice to.
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supremefaulk
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Registered: 5th Feb 08
Location: Bridgend
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Thats a good idea with wire wool, as it needs a good cleaning before polishing really!
No idea whats on there, but it doesnt seem to want to come off!!
Big fan of megs stuff, so will probably get that!
What about Sportex then? are they any good? as they are slightly cheaper - which I like
or should I go with Janspeed?
Thanks again for the help Phil
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supremefaulk
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Registered: 5th Feb 08
Location: Bridgend
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Dont know if you can see it that well, but thats the kind of stuff on the exhaust!
(old pic, car is actually clean now! haha)
[Edited on 19-04-2009 by supremefaulk]
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Phil_b
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Registered: 31st Mar 08
Location: Wirral
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no probs fella.
That should come up fine but put some of the metal polish on with the wire wool, and rub until it goes shiny!
ive never had a sportex so couldnt say, i know there is problems with some manifolds hanging low which isnt good with a lowered car, but the janspeed one is fine. I'm buying one off my mate soon, we fitted it to his and it seems well made and really did make a difference to the power with his lexmaul on to!
maybe someone else can comment on the sportex, or do a search on them
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supremefaulk
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Registered: 5th Feb 08
Location: Bridgend
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Good news, will be polishing the exhaust soon then! Hopefully it will come up nice!
Just done a quick search on sportex, and cheap crap by the sounds of it, piper or janspeed de-cat is the way forward!
More expense, but probably worth it!
Right, thats all I needed to know now I think, thanks for the help mate, will post again with any findings probably!
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tom_simes
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Organiser: South Wales
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Registered: 12th Jan 05
Location: Undy, Newport Drives: Skoda Octavia vRS estate
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A Janspeed de-cat also has a silencer built in, so it'll stay quiet
It does stink of fuel though, which isn't good!
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Phil_b
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Registered: 31st Mar 08
Location: Wirral
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didnt know it had a silencer in them....
definately get something that people rate, ive got the piper cat back system and love it 
no probs glad i could help ya, good luck
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swill_omnibus
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Registered: 12th Dec 07
Location: : S. wales Drives: Dodge Caliber
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But i'd have thought with the whole back pressure issue a "sports cat" would be best of both worlds as their only 100CELL and still maintain some pressure in system?
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supremefaulk
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Registered: 5th Feb 08
Location: Bridgend
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Thats cool, I will keep looking for a piper or janspeed then!
Will keep my eye out for one with a silencer in it too! Thanks tom!
I would have thought that too steve, although the only sports cat I could find was a 200 cell one!
But I suppose that the exhaust gasses get "pushed" out of the engine by the piston goin up, so the less restriction the way out has, the better, so no cell cat would be better in that respect!
But a sports cat is probably more "stable"
Probably talking rubbish though! haha
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