Where to buy a sport cat?

[Ross]

I bought the RS2 with decat pipes and a 3" cat-back system. The exhaust has a bit of boom but alot less than my last full 3" system and I can live with it.

Problem is, I don't want to get stuck into cat swaps every year and I don't have stock cats anyway. So I may as well:

1) Get rid of the stock downpipe
2) Get rid of the Y-piece and decat pipes
3) Fit a new 3" downpipe + flexi, with a sports cat.

I am concerned about the extra noise I'll potentially get by doing away with the Y-piece. I'm hoping a sports cat will balance it out...

Can anyone recommend a place to buy a decent 200-cell sport cat that will ensure I get through an MOT and doesn't cost a fortune?

Also what's the difference between ceramic and metal catalysts - I have read the RS2 was fitted with ceramic, vs metallic for the ABY, what's the reasoning?

Any experience in the change in noise when ditching the Y-piece? My concern is, if it increases boom I will definitely have to fix it - want to avoid being in that scenario.

Ross

[s2driveruk]

Y piece is a significant strangle point although less so on the ADU than on a 3b. I think Longlife did 100 or 200 cell cats - forget the name but i posted somewhere a while back (Rossi I think) but should be able to get hold of a sport cat easy enough

[A80Avant]

why is the y piece a strangle point? i would have thought that going from a 3inch to a dual 2.25 inch (or whatever it actually is) is actually larger overall bore than keeping 1 pipe with 1 cat... Maybe im wrong.

[MattS2]

I think this is the one I am using.
Passes the MOT ok but isn't there some loophole with the avant.

[A80Avant]

Advanced Automotive Systems here in Newcastle have 200cell sports cats and they use them. I think they are about 180GBP each. I have a booked appointement at the end of the month for some work on the car there and if you like i can ask. If you email them, Stuart is a very good guy and can respond very fast

[s2_wot]

Ross try www.bmcatalysts.co.uk they manufacture them and quoted me something like £70 previously but I can't remember if that was 100 or 200 cpi.

Metallic are more durable by the looks of pics in this thread

http://www.s2forum.com/forum/showthread.php?t=49040

[Ross]

Thanks for the replies... I really got nowhere searching earlier

I'll give BM catalysts an email, see what they say, I also found an abundance of cheap metallic Maganflow sports cats on ebay:

http://cgi.ebay.co.uk/3-MagnaFlow-20...item3cb93cc770

Claims to flow the same as the 034 one, and at that price it seems worth it to just have a punt.

@Vas, £180 seems very reasonable as well, just trying to find out now if there's really much difference between a £80 cat and a £180 cat

[jade]

I bought the RS2 with decat pipes and a 3" cat-back system. The exhaust has a bit of boom but alot less than my last full 3" system and I can live with it.

Problem is, I don't want to get stuck into cat swaps every year and I don't have stock cats anyway. So I may as well:

1) Get rid of the stock downpipe
2) Get rid of the Y-piece and decat pipes
3) Fit a new 3" downpipe + flexi, with a sports cat.

I am concerned about the extra noise I'll potentially get by doing away with the Y-piece. I'm hoping a sports cat will balance it out...

Can anyone recommend a place to buy a decent 200-cell sport cat that will ensure I get through an MOT and doesn't cost a fortune?

Also what's the difference between ceramic and metal catalysts - I have read the RS2 was fitted with ceramic, vs metallic for the ABY, what's the reasoning?

Any experience in the change in noise when ditching the Y-piece? My concern is, if it increases boom I will definitely have to fix it - want to avoid being in that scenario.

Ross

The RS 2 Has metal cats

A good cheap set up for a RS2 is to use a RS4 system 75mm, join it up with a 3" centre section with a cat going to down pipe 3"

The system sounds good, and not to loud

For the cat http://www.summitracing.com/parts/MPE-59929/

I am look at getting one of these as soon as possible

[A80Avant]

Jase (Jas11N) had gone the other way on his coupe, to go cheap and ended up having the cats fully blown and the exhaust blocked. I would highly recommend AAS and every work they have done so far is very good. They will be fitting my vaccum servo in 2 weeks and making a new strut bar as well. They have done my downpipe and catch tanks as well.

[Rusty]

Prospeed did my 100cpi cat and it's passed all MOTs since. Ditch the DP and sell it on; replace to the centre box with 3". Job done.

[Jonnybravo]

I know someone who is a Longlife agent, they just did some work on the exhaust on my racer and he has mentioned that they do sports cats.

I will happily ask for a price for you

[Ross]

Any info/price is helpful johhnybravo, particularly what cell, if it's metallic

@ Rusty that's interesting as I didn't think a 100 cell would get me through an MOT, will look into that one! That is my plan exactly, sort the system and fingers crossed noise levels stay about the same. If not, I'll probably replace the back box with a smaller bore.

I have a downpipe sorted, just need to source V-bands, flexi piece and sports cat. RS2 downpipe anyone? :mischeif:

[Sonic]

Lloyd recommended this place to me - http://www.christullettexhausts.com/...pipe-bends.asp

[s2driveruk]

hmm had to admit that the car will not pass the BET test without a cat on mine after testing it on Saturday. Just cannot get the CO low enough (0.63 with limit at 0.30. Everything else was miles inside.

Frustrated as the car sounds, runs and feel so much better without them on. I'd like as free flow as possible without the hassle of a swap every year.

Am presuming a hot car and a 100cell should be enough to nudge this down to the right levels but anyone got any real world experience on this one?

Cheers
David

[DJones]

hmm had to admit that the car will not pass the BET test without a cat on mine after testing it on Saturday. Just cannot get the CO low enough (0.63 with limit at 0.30. Everything else was miles inside.

Frustrated as the car sounds, runs and feel so much better without them on. I'd like as free flow as possible without the hassle of a swap every year.

Am presuming a hot car and a 100cell should be enough to nudge this down to the right levels but anyone got any real world experience on this one?

Cheers
David

David,

Not much help.... But my 996 has 100 cell cats (Miltek) and that recently passed at a level of .016%.

As as say not much help but a guide on the 100 cell cats.

Darren.