Catback question

[sergemcgraw83]

Have a golf with stock DP (and will stay that way.)

I can have a 2.5inch golf MF catback or a 3inch GTI MF catback for the same price. Is there a sound difference? Fittement? I have a gti rear valence on hand so thats not a factor. I mostly want a quiet setup but the gti one looks better.

 

[Desslok]

I have the MF GTI catback and it isn't loud (with the stock dp ) but quite noticeable over stock. It comes without a resonator. You could easily add a resonator or a round case muffler ( if needed ) to the straight section to quiet things down. That is a matter of personal taste. Both systems probably sound alike, but larger diameter pipes tend to be more boomy.