Decat For 1st Cat

[rallure]

I have read the 1st cat on the mk1 aristo is different from the mkiv supra cat, so i was wonder if anyone on here has found a decat for the first cat? im looking to get a double decat but not sure where to get a decat pipe to replace the 1st cat.

anyone help?

[Ahhhh__Aristo]

Leeky said he was getting it done a couple of weeks ago, but haven't heard anything more on here about it.

I've not yet had time to get it to me mates garage, hopefully next weekend.

[rallure]

im thinking i might just take the cat off and remove the insides and then it is a nice decat that fits pefectly

[Dave-Ellen]

I'll have some in 2 weeks :D

[rallure]

I'll have some in 2 weeks :D

good on ya, PM me when you have them in.I want one please :)

[Dave-Ellen]

I'll have some in 2 weeks :D

good on ya, PM me when you have them in.I want one please :)

consider it done :D

[Ahhhh__Aristo]

im thinking i might just take the cat off and remove the insides and then it is a nice decat that fits pefectly

That was my plan aswell, and doesn't cost anything lol

I'm really surprised they're different to the supra, only going by heresay, be interesting to see.

[rallure]

im thinking i might just take the cat off and remove the insides and then it is a nice decat that fits pefectly

That was my plan aswell, and doesn't cost anything lol

I'm really surprised they're different to the supra, only going by heresay, be interesting to see.

im sure they must be different as the exhaust manifold is different so maybe the angles are different

[Dave-Ellen]

will be offering

soarer 2.5 TT

Aristo TT mark 1

Supra mk4 TT

[Leeky]

Im getting the mk4 supra blitz 2nd decat pipe fitted as i hear its the best for the job.

Im going to leave the first cat in as i want to get it through future MOT's without any hassle of putting a cat back in.

Also im looking to run no more than 1.1bar at the absolute maximum and 'should' be able to do this with a single cat still in and still with the stock exhaust system also.

Also seeing as if you do decat the the whole system you need a restrictor plate i thought it probably wont flow much more than leaving one cat in anyway.

[rallure]

Im getting the mk4 supra blitz 2nd decat pipe fitted as i hear its the best for the job.

Im going to leave the first cat in as i want to get it through future MOT's without any hassle of putting a cat back in.

Also im looking to run no more than 1.1bar at the absolute maximum and 'should' be able to do this with a single cat still in and still with the stock exhaust system also.

Also seeing as if you do decat the the whole system you need a restrictor plate i thought it probably wont flow much more than leaving one cat in anyway.

im sure you wont boost anywhere near 1.1 bar with the 1st cat still in place. That is the most restrictive one. With the 2nd cat removed you will boost about 0.9bar or so. these are the figures that the supra guys go by.

[robjonk]

With second cat removed I can boost 1.2 bar with no problems.

I had the blitz second decat pipe but changed it when i lowered the car as it kept scraping everywere. No got a s/steel 2 1/2" one ( blitz was 3") and you can feel the difference with it especially low down in the rev range.

[rallure]

With second cat removed I can boost 1.2 bar with no problems.

I had the blitz second decat pipe but changed it when i lowered the car as it kept scraping everywere. No got a s/steel 2 1/2" one ( blitz was 3") and you can feel the difference with it especially low down in the rev range.

rob dont forget the pic please mate.

[Leeky]

No got a s/steel 2 1/2" one ( blitz was 3") and you can feel the difference with it especially low down in the rev range.

You saying that fitting the smaller pipe improved the setup?

[robjonk]

The small amount of back pressure gives better low down power (before coming on boost) and a 2.5" pipe is good for 450 brake.

The only thing to remeber that removing any of the cats will plunge your fuel economy way down. That was the first thing I noticed after doing mine , much more power but crap mpg.