Thread: Exhaust diameter for a 71 stock GMC
View Single Post
Old 10-29-2017, 01:24 PM   #4
racerop
Registered User
 
racerop's Avatar
 
Join Date: Jul 2015
Location: Lindenwold, NJ
Posts: 94
Re: Exhaust diameter for a 71 stock GMC
C=πd

Pie=π
C=circumference
d=diameter
racerop is offline   Reply With Quote