Exhaust Questions - S2

[jamieda]

Hey Guys,

Just been looking under the car and had some questions about the exhaust, it looks like it has a cat on it, then another small box then the back box.

What is the little box in-between the cat and the back box?

Its a Dansk exhaust, can i make this system sound louder with mods?

Does a 1991 S2 need a Cat to pass an MOT?

[/URL]

[/URL]

[/URL]

Happy Christmas
J

 

[white944]

A '91 doesn't need a cat. But it does have to be running well enough to pass an emissions test.

 

[Diver944]

The little box is a small muffler that is part of the rear Dansk exhaust.

Many people cut out the cat and replace it with a straight piece of stainless. This does make it louder but not uncomfortably so.

I had this done by a local exhaust place when my cat became holed, it cost circa £100. I have no problems passing the emissions test

 

[jamieda]

Awesome thanks Paul.

So i guess a Cat bypass pipe is actually just a piece of pipe right?

Thanks
Jamie

 

[Monkeythree]

Yup, cat delete pipe is just a straight piece of steel tube with the appropriate flanges either end.

 

[Eldavo]

Here's an S2 exhaust without the cat but retaining the centre silencer, I'd be tempted to get rid of both and keep the Dansk back box, should be pretty cheap if you know a decent exhaust builder.

Here

 

[jamieda]

Ive ordered a Cat bypass from promix, going to try and fit it myself! no idea how hard it is, it looks simple enough famous last words haha

 

[Mike_Pollock]

It is simple -2 or 3 bolts either end with appropriate gaskets, biggest thing is to get the car high enough to work under, ramps or jacks and axle stands.

 

[Diver944]

I may be wrong, but I am pretty sure the Promax Cat Bypass requires the front pipe to be cut forward of the original Cat.

The 'Bypass' then bolts to the rear box with a three bolt flange, but the front slips over the pipe that you cut and is secured with a 'U' clamp