I am looking into getting a custom true dual with quad tips for my 2005 G sedan (yes, I know I will have to have the evap canister relocated). I will probably be using dual Magnaflow mufflers. My question is what size tuning is best for a N/A motor 2.25 or 2.5, and should I have resonators installed since I will now have two mufflers instead of one.

I like the look of the quad tips kinda like M3 or M5.

 

2.25 or 2.5 would be too big, you would loose your eg velocity, 2 inch should be more than enough, larger would be a good idea if you were going to add a power adder at some point, though...

 

Hey guys, i just got an 07 G35 S...I wanted to change my dual exhaust tips into quad exhuast tips. I don't want to upgrade the catback, just the tips for the look. Has anyone done this yet? Pics?

 

The Borla dual is 2.25 and the stillen is a little larger. If you plan to stay N/A I would run 2.25. If you plan for some good breather mods I would go 2.5".

 

5150DS,

Where are you planning on relocating the vap canister?

 

Nothing's wrong with going 2.5 if you're going to add more mods. That is if you don't mind losing just a little down low and gaining more up top.