Hi, I have an aftermarket exhaust on my zed twin turbo, it was on the car when it came in from japan, however the centre box knacked, it was making a vibrating noise so I reckon the baffle pipes inside went, anyways theres a couple of flanges about 4 inches from the front and the flanges at the back end are about a foot towards the rear cans on the bends, what my question is, is will any centre box like a standard one fit in via the flanges, or with it being an aftermarket thing will I have to have a centre box made for it?

 

I replaced the box with two pipes thinking this would sort it, but it's making the car run like a bag of hammers, something to do with eliminating back pressure or something, so it has to have a box.

 

Any help?

It's been sugested to me that I should replace the two paralell pipes that have been fitted where the box used to be with an X pipe, thus balancing the two banks and creating back pressure.

 

Sounds about right yes?