DE-CAT

[sly 1.7]

I am thinking of de-cating my standard manifold does anyone no the diameter of the pipe I will need? Cheers

 

[paulthepole]

what you doing for if it for nose then just get a back box and cut the mid box off
that what i have done and it pop and bangs like a goodon

 

[sly 1.7]

i have a stainless miltek cat back, no mid box but the back box just makes it so quite........ want the litte extra bhp too lol

 

[haGGard]

Its kinda hard to decat the standard manifold, as its located behind the engine. Would also make fitting a cat come MOT day very hard also.

 

[sly 1.7]

thats where knowing people who do MOTs come in handy haha/................. might just save up for a new de cated one

 

[haGGard]

I know people who do MOTS but they're not bent testers.

 

[slayllian]

I know people who do MOTS but they're not bent testers.

agreed, no matter how many apples I buy my mate he wouldn't do that!

 

[dtq]

I know people who do MOTS but they're not bent testers.

agreed, no matter how many apples I buy my mate he wouldn't do that!

Ive known cars which have been decatted that have passed MoT emissions no problem, but no idea how the puma would fare.

If I were to decat the puma I would probably go about it using a 4-2-1 manifold and matching system, and then making up an adapter section so I could but the cat back for MoT's. Thats assuming a 4-2-1 manifold doesnt just bolt up to a stock system. However it has to be said more noise is not a positive thing to me

 

[haGGard]

A milltek 4-2-1 leaves a gap for a cat or a decat section between the flexi and main exhaust. Which would be ideal. Its what i did, decat all year round, and whack the cat in there come MOT day.

My MG ZS180 technically has a 'decat' as the main cat has been removed. However there is a seperate pre-cat in the downpipe of these cars which will still pass the emissions test with the main cat being removed.

I dont see how a car with not a single cat will pass an emissions test :?

 

[Dave93.marsh]

It won't pass, I was running de-cat on my FRP and had to put the cat back on for it, and was told that a sports cat is a better option as it keeps the exhaust fume flowing freely and less hassle when it comes to MOT time!.

Diesels cars can run de-cat no problem and still pass an MOT.