cat for mot
so i have a hawk sti with a full 3" decat system.
3" downpipe of unknown brand 3" center section by scoobyworld (afterburner) non-resonated 3" afterburner vortex backbox my usual guy i use for mot's cant do them anymore so i think its easier if i get him to fit a cat just for the mot, exactly which one would i need? cheers |
Just get a sports cat bud 200 cell or a Prodrive one think there 200 cell aswell. Got one on my Impreza that I bought off here works well.
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Originally Posted by jaygsi
(Post 12039678)
Just get a sports cat bud 200 cell or a Prodrive one think there 200 cell aswell. Got one on my Impreza that I bought off here works well.
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Originally Posted by the shreksta
(Post 12039681)
are they available in 3 inch fitment?
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so am i looking for a sports cat in the downpipe or in the center section?
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Originally Posted by the shreksta
(Post 12039704)
so am i looking for a sports cat in the downpipe or in the center section?
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Originally Posted by SmurfyBhoy
(Post 12039706)
You want it closer to the turbo than the backbox or wont heat up and chances it can fail when cold
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something like this might do.
https://www.ebay.co.uk/i/15119964783...3D151199647837 or try find something 2nd hand and cheaper |
Originally Posted by hackisfun
(Post 12039710)
something like this might do.
https://www.ebay.co.uk/i/15119964783...3D151199647837 or try find something 2nd hand and cheaper |
As Smurf said, it wants to be as close to the turbo as possible. Cat in centre pipe won't work. I have a friend who has a Litchfield Forester STI and it has a sports cat in the centre pipe and fails MOT emissions every year without fail.
Cobra make a full 3" downpipe with sports cat. |
Originally Posted by the shreksta
(Post 12039711)
is it me or does that look like it tails off to 2.5" fitment
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Is it to be fitted all the time or just for MOT`s ?
Reason i ask is it take ALOT of heat to get my sportscat close to passing a CAT emmissions test, i mean, up and down the bypass twice at 70 , ingo MOT station and do emmssions test straight away and then it still needs idle revving to get back to correct heat. if its just for mot id stick a normal cat in it to be safe |
Originally Posted by The Rig
(Post 12039734)
Is it to be fitted all the time or just for MOT`s ?
Reason i ask is it take ALOT of heat to get my sportscat close to passing a CAT emmissions test, i mean, up and down the bypass twice at 70 , ingo MOT station and do emmssions test straight away and then it still needs idle revving to get back to correct heat. if its just for mot id stick a normal cat in it to be safe Had a Saab Hot Aero with Sports Cat which needed to be roasted to pass |
To be fair i need to give mine a blast to pass, but always does, thought thats because mine is just a summer car. Thats 200cell, you can get 100 cell that should pass alot easier. Also mine is heat wrapped. Be worth wrapping your exhaust manifold aswell if you go down this route.
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Think you'll find that's the other way around.
200 cel is more MOT compliant and easier to pass than 100 cel which is less restrictive and lets more harmful particles through. I had a 200 cel cobra on my car and passed MOT fine every year without having do drive it like I stole it beforehand. |
thanks for the advice guys, i may try and find another place that will do it for me as i cant be bothered with the hassle. theres loads of tricked up cars around here so chances are most are running a de-cat
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