***The Definitive Flathead Exhaust Thread with VIDEO***

What size exhaust pipe?

 

They are 1 3/4" with Red Headers


Sent from my iPad using The H.A.M.B. mobile app

 

Guys- I assembled some better "back to back" videos from my phone to better compare. I posted this on another thread but I figured it belonged here for proper documentation.

These are all within a 6 month window... 268 flatty with slingshot intake and Harmon collins full race

Straight 2" pipes:


Porter 2" shortys:


Classic Chambered 2" shorty:

 

Me likes a-lot!!!!

I am doing something similar, but for now straight pipes coming out under the running boards in front of the Rear wheels (1- 3/4 ) then later cut it off, below the frame, and run 2” pipe with 19” cherry Bomb M-80s with 2-1/2 slash cut chrome tips, hopefully going from 1-3/4 headers to 2” pipe to 2.5 tips will amplify the tiny Flathead a bit

 

1”3/4 pipes coby type cherry bombs . Nothing fancy in the exhaust , 50 mercury manifolds cut and played with . L100 cam etc
https://www.jalopyjournal.com/forum/posts/12466630/

 

My second roadster, 239ci with Howards cam, 1 1/8 headers thru 2'' stainless tube and motorcycle baffles