[Jacques Reed]

Hi Hanno,

Those dimensions seem correct. A ford Truck manual for wartime trucks, not CMP type however, also gave the muffler dimensions as 6" Diameter and 18" long. Would reasonably assume the mufflers are the same. Ford tended to keep it simple and use off the shelf items whenever possible. By example: the choke and throttle knobs on the CMP being the same as used on their passenger cars of that era.

Two sets of original exhaust pipes also confirm that the muffler inlet ID is 2"

I cannot independently verify the 1-5/8" ID outlet on the muffler as I used Tony's information from brackets he supplied me, however the careful analysis of both original tailpipe and rear muffler brackets makes me 99% certain it is 1-5/8" ID. (1-3/4" OD pipe is too big a stretch in the brackets). A Dennis Carpenter Ford Reproduction car tailpipe bracket I have also indicates tailpipe sizes were 1 5/8" OD.

Hope this helps.

Cheers