Mongoose for deffo, I have had 4 mongoose exhausts now 1 on a Fiesta Si, 1 on a Fiesta XR2i, one on me Fiesta Turbo and the one on my current RS1800.

They have excelent build quality, fit perfectly, and are not to loud (except the one on my FRST).

Would never have a Magnex would prefer some kind of life treatening illness.