whats the stock exhaust's diameter?
 

Just curious on what the diameter of the stock exhaust is.... i just installd my u/t y-pipe now im considering the greddy street performance rear section exhuast becuase i believe they are both 70mm, maybe my y pipe is 76mm but its gotta be a better flow rate than stock with the greddy. does anyone know how many mm stock exhuast is? thanks

2003 LaserRed 6 spd coupe w\ Nav
Stillen Intake w\ Z tube
Kinetix Res. Test Pipes & Plenum
Unlimited Tuning Y-Pipe
U/R Crank pulley, 19" Gun
Metal DTM Kruez 10's.....

bump
 

need to confirm stock exhaust diameter of 05 sedan. intermediate pipe to muffler. cars in shop and cant check manually. need to order a replacement split flange repair kit to replace the rotten ones. assume its close to 2.25" or 2.5". have been off the forums for a long time. now car starting to fall apart. thanks.

I looked in the FSM and it didn't list the size. You might go through this thread, it might at least have the diameter of the front of the midpipe (the part you are talking about). Probably the same at the other end, but I'm not positive about that.

https://g35driver.com/forums/intake-...hlight=hr+pipe

Might be your answer

thanks. I was able to measure it yesterday. close to 2 1/5".