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).
Blueprint showing a modification to the end ports of a Bentley exhaust manifold.
| Identifier | ExFiles\Box 86\3\ scan0037 | |
| Date | 9th November 1933 | |
| B.V. 11. 2.300 DIA .625 .750 RAD 1.000 RAD. 2.300 CTRS. 2.950 .2656 SLOTS .875 .250 RAD ROLLS-ROYCE, LTD PRINT ROOM 9 NOV 1933 DERBY. ALL OTHER DIMENSIONS SEE E.B.155 MODIFICATION TO END PORTS (BENTLEY EXHAUST MANIFOLD) RMH 9-11-33 | ||