Optimum Exhaust size?

[Gav]

Hi all just wondering what the optimum size exhaust is for a fully modded galant/legnum

Currently runninng a hks super dragger 3inch but I've also got a jasma 3.5inch exhaust off the car I'm wrecking.

My Car has dump pipes and a set of front pipes

 

[jungle]

Your 3 inch will be fine for any power level you throw at it.