Blueprint showing front and side elevations of a W-shaped four-port exhaust manifold.
| Identifier | ExFiles\Box 31\4\ Scan179 | |
| Date | 1st July 1932 guessed | |
| EX, EX, EX, EX, 45° | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).