S-trim fox - Which exhaust to buy?

[fastsvo]

Hey Guys,

I am debating whether to go with a 2.5" or 3" cat back exhaust for this car.

Motor is stock minus the GT-40 intake, 70mm TB, JBA headers, BBK catted 2.5" h-pipe, and 3:73 gears.

This car is driven on the street and I need to find a setup that will flow great and be drone free.

Any ideas?

Thanks!