VassiliZeitsev

I really hope this hasn't been asked before. I actually did do a search and couldn't find anything...

After I purchase my wheels/tires I'll be getting an exhaust and HFC. My question is:

What is the diameter of the stock piping on a 350Z? 2"? I was looking at various aftermarket catback exhaust systems and they range from 2.25" - 3" for the ones I'm interested in.

Thanks in advance.

03Zilverstone

iTrader: (4)

The inside diameter is around 2.25". My calipers measured 2.3-" O.D.

SharpShooter23

iTrader: (5)

+1

VassiliZeitsev

Thanks guys. So wouldn't going to a larger diameter exhaust (3") benefit more than going with a system like Borla which says its 2.25"?

SharpShooter23

iTrader: (5)

I am actually going to the Agency Power cat-back single exhaust, it's 3". Less weight, more hp and torque, can't beat it in IMO.

03Zilverstone

iTrader: (4)

The pipe is only part of the equation. You have to look at the muffler, resonator, y-pipe setup. Also the bends in the pipe.

reldla1996

The factory exhaust is 60mm, or about 2.36". The inside area of two 2.25" pipes is 7.95 square inches, while a single 3" pipe is 7.07 square inches. A single pipe will have less frictional losses than 2 pipes, so the differences in area are small. I agree with Zilverstone that there are a lot of other factors to consider.