No such special and exclusive manifolds can be defined as having been then and there realized.
"The Approach to Philosophy"
Ralph Barton Perry
The Packard diesel was flown at times without exhaust stacks or manifolds; this was practical from a safety standpoint because of the diesel's lower exhaust temperature due to its higher expansion ratio.
"The First Airplane Diesel Engine: Packard Model DR-980 of 1928"
Robert B. Meyer
So had the Clarkes made good, the manifolds, the Blacks and many others whom in after years I had to thank for much kindness and hospitality.
"The Chronicles of a Gay Gordon"
José Maria Gordon