Exhaust Question

jpit · 02-13-2010, 02:27 AM

Can anyone who removed the stock exhaust system please measure the inside diameter of the mid-pipe (both sides)? Thanks.

NYBladeZ · 02-13-2010, 10:55 AM

I'd guess 2.25" I know for a fact that it's less than 2.5", I removed the stock cats and they ran 2.25"

F.I. Inc. · 02-14-2010, 01:20 PM

I have stock exhaust system here at the shop. I just took a measurement for you.

The inlet of the middle pipe which is a (Y) has an inside diameter of roughly 2-3/8" which will equate to 2.5" outside diameter.

The 2 pipes in the back which are the outlets which go to the muffler are roughly 2" on the inside.

Remember, when it is automotive relate we refer to it as "Tubing" not "Piping"

Piping is known in the plumbing industry. A piping size is always measured from the inside where the tubing measurement is always measured from the outside.

I hope that this information helps and if you have any further questions, please do not hesitate to ask...

Thank you, Tony

jpit · 02-14-2010, 02:17 PM

Tony,

Thanks for the info. So when they say that an exhaust is 2.5", they are quoting the outside diameter.

Togo · 02-14-2010, 02:32 PM

Quote:

Originally Posted by jpit

Tony,

Thanks for the info. So when they say that an exhaust is 2.5", they are quoting the outside diameter.

Correct.

Interesting on the Piping vs. Tubing, Tony. I'm going to remember that fact!

F.I. Inc. · 02-15-2010, 12:38 PM

Quote:

Originally Posted by jpit

Tony,

Thanks for the info. So when they say that an exhaust is 2.5", they are quoting the outside diameter.

Correct, 2.5" O.D. stands for outside diameter.

If we were referring to piping we would say 2.5" I.D. which means inside diameter...

Tony

02-13-2010, 02:27 AM	#1 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 16	Exhaust Question Can anyone who removed the stock exhaust system please measure the inside diameter of the mid-pipe (both sides)? Thanks.

02-13-2010, 10:55 AM	#2 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	I'd guess 2.25" I know for a fact that it's less than 2.5", I removed the stock cats and they ran 2.25" __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

02-14-2010, 01:20 PM	#3 (permalink)
F.I. Inc. The370Z.com Sponsor Join Date: Feb 2009 Location: Simi Valley, CA Posts: 2,989 Drives: 2010 GT-R/2007 F-250 Rep Power: 685	I have stock exhaust system here at the shop. I just took a measurement for you. The inlet of the middle pipe which is a (Y) has an inside diameter of roughly 2-3/8" which will equate to 2.5" outside diameter. The 2 pipes in the back which are the outlets which go to the muffler are roughly 2" on the inside. Remember, when it is automotive relate we refer to it as "Tubing" not "Piping" Piping is known in the plumbing industry. A piping size is always measured from the inside where the tubing measurement is always measured from the outside. I hope that this information helps and if you have any further questions, please do not hesitate to ask... Thank you, Tony __________________ *Follow us on Facebook: Fast Intentions Inc.* Phone: (805) 522-FAST (3278) Email: tony@fastintentions.com www.fastintentions.com "FUELED BY PASSION"

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02-14-2010, 02:17 PM	#4 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 16	Tony, Thanks for the info. So when they say that an exhaust is 2.5", they are quoting the outside diameter.