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).
Specification for the exhaust system on the larger bore Phantom II (27-EX).
| Identifier | ExFiles\Box 19\1\ Scan257 | |
| Date | 13th March 1933 | |
| X9/120 RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}9/KT.13.3.33. EXHAUST SYSTEM FOR LARGER BORE P.II (27-EX). The exhaust system for this car should be Phantom II standard, using the standard resonance silencer (the silencer off 19-EX can be used) but with a larger diameter swanneck similar to the one fitted to the silencer on 20-EX. - i.e. Hs.{Lord Ernest Hives - Chair}789. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} | ||