best size backbox for na ?

[jimmymac101]

I am going to be splashing the cash on Saturday for an infinity cat back system for my na I have asked for a 2" tipped back box and I was wondering if I have made the right choice

[Amjad]

3/3.5" ftw check my build thead

[tom_parts]

ive got 3.5 on my sr dude

[jimmymac101]

What size is a tte backbox?

[ali_legend]

4" ftmfw!! TTE is 2.5" i think mate

[raffa_mk]

if youve got n/a bumper 3" max if your going to fit glanza bumper then 3.5" or 4" depending on how loud you want it, i have 4.5"