Post by
TurboKA37 »
https://forums.nicoclub.com/turboka37-u7969.html
Thu May 06, 2004 9:09 am
ive got one sitting in my garage and i measured it at 2" a couple days ago for someone else on here that asked. along with the 2" is a lot of crush bends and a bottle neck thing at the flange so there would be alot more restriction than an aftermarket even if the piping size difference was minimal