I'm also concerned about noise, as although I have fitted the Magnex, it has the HUGE megaphone tail-pipe which seems to have AMPLIFIED the noise at low speed . It does seem quieter at high speed, but that may be because it focuses the sound waves behind the car more.

Bugger . It is also marginally less restrictive than the Mongoose as well by 4psi . No good if it doesn't even pass the static noise test though .