I really want to add tomei exhaust in my g37x sedan

i heared some user done this before, i heard i need 12 or 16 inch extension..

anyone know how ?

i'm running catless test pipes..

 

 

I cant get a straight answer. On a sport coupe 12" was good enough but a bit tucked in. I had 14" on my IPL coupe and it was perfect.
i met a guy wo said his was 18-20 inch on his sedan but wasnt too sure. Someone else said 16" on a sedan was good.

heres some pics i found.

You have options if your looking for bolt on extension
topspeed 12"
and z1 sells 7 and 10
i was going to get two ten inch from z1 and hope for the best.