Exhaust Backbox: keep it original or go for Magnex/Devil?

[kratos]

No problems with the original renault exhaust mine has on it at the mo, but just thinking, will a magnex/devil (backbox only) give an upgrade in the performance?

[Lunner]

A backbox on its own will do next to **** all for the performance

[titcharoony]

even with full system we're thinking a couple ponies only right?

[Joel]

Standard Loud exhausts do your Nut !!