PaulHail Well-Known Member Joined Mar 30, 2017 Messages 357 May 11, 2017 #1 What is the od on the exhaust stub on the 21 dd? Trying to figure out if the Nova header will work for my CMB VAC 21.
What is the od on the exhaust stub on the 21 dd? Trying to figure out if the Nova header will work for my CMB VAC 21.
timothy johnson Well-Known Member Supporting Member Joined Jul 9, 2011 Messages 1,795 May 11, 2017 #2 Paul if your in town you can try it on one of my engines. Tim
Brian Sorgente Well-Known Member Supporting Member Joined May 25, 2004 Messages 1,254 May 12, 2017 #3 I run a Nova header on my Mac21 OB. I just use the CMB seal instead of the nova one. A short piece of silicone tubing works too.
I run a Nova header on my Mac21 OB. I just use the CMB seal instead of the nova one. A short piece of silicone tubing works too.
GraysonTaylor Well-Known Member Supporting Member Joined May 1, 2017 Messages 361 May 12, 2017 #4 The stub is tapered. Nice silicone duanut. .600" to .665". The id of the header is .735". Hope this helps. Last edited by a moderator: May 12, 2017
The stub is tapered. Nice silicone duanut. .600" to .665". The id of the header is .735". Hope this helps.
PaulHail Well-Known Member Joined Mar 30, 2017 Messages 357 May 12, 2017 #5 Grayson, Thanks for measuring. The VAC stub is 0.630", looks like the nova header should fit fine.