Originally Posted by rapidcossie

I had the magnex on my car before fitting my large exhuast system

The magnex is 3" from the turbo to about 3/4 of the way down the downpipe where it splits into 2X 2.25 pipes, these run into 2 centre silencer boxes then back into one 3" pipe just before the back box.
The tail pipe is 3" inwardly rolled.

My car made a max of 408 ATW with this system but the back pressure was starting to rise quite badly at this point.

I would recommend it to anyone running less than a T4