Sports Cats

[Rusty]

So, having had a 100 and 200 cell cat and struggling to pass the MOT for the last 5 years, I'm totally fed up with trying to do the right thing. It's cost me £00s and the cats seem to be made of dairylea.

Anyone else had the sasamene issues or do you just not bother trying to get a 21 year old car to comply?

New engine will help things, as the current lump has 176k on it...

[GazzaG60]

when i had the s2 i bought a cat for the 3" but never used it. it wass a jetex. just sold it to curlylee.

i used a friendly mot man instead. he was better at emissions than any cat.

now im on a 1991 car i can run without without any issues.

i think best way is to get a more or less factory cat anf have it fitted to 3" ends and use it once a year. remove it again. should pass a few years running, hassle i know. when i spoke to jetex they said it was hard to make just 1 cat that will flow enough to pass the test well for 500hp. they said wrc uses 2 cats in general for this reasion.

[Rusty]

I'm considering doing as you say with v bands.

[GazzaG60]

makes sense. i too wanted a fit and forget solution i wanted peace of mind knowing that i could pass the test no issues on my s2. in the end i thought it really wont exist. i read a lot about tuned cars and the fact that cats in some only are effective for a few weeks/months. i already knew the difference in hp it made on subaru just by removing the cat even in stock form. then speaking to jetex and what thye thought about cats i was a little disillusioned with it.

i feel a tuned car at 300 ish would be fine with the jetex cat burt at a lot more hp not really. id make 2 pipes one for each end of cat and a bypass and just fit it when needed. especially with your track use. that way when the cat does pack in you can jus get a factory one again.

[Rusty]

The exhaust place I use should be able to sort me with a high cell stock cat.

[Henkjan]

I've had a sports cat for years (from 034), was fine until this year (failed MOT), so had a new one fitted (bought locally this time).
So with a proper one, there should not be an iissue, maybe you had bad luck?

[Rusty]

Yes, could well be the case but I'm fed up with being worried come MOT day

[newsh]

I ran the Indigo Avant for a few years with gutted cats and it always passed, I took it to 3 different places with no comments at all. The car was a '94.

[Rusty]

Must have been put through pre '92. 94 limits are much tighter.

[Rikki Kitto]

Mine just passed with no cats, ya need an S2 friendly tester

[newsh]

I think it depends on the software and how much oil you're burning, that car did have a hone and new rings..

[s2driveruk]

no cats on mine...sensible tester required but for sub 5k miles per year and new rings/hone and decent service...should come VERY close anyway.