| Description | Date | Identifier | |
| Test on the rubber silencer suspension for a Bentley vehicle. | 26th Jul 1933 | Box 86 \ 3 scan0019 | |
| Graph of load and deflection measurements for a Bensport silencer suspension front bracket. | 24th Jul 1933 | Box 86 \ 3 scan0020 | |
| Graph showing load vs. deflection characteristics for Bensport silencer suspension rubber pads. | 24th Jul 1933 | Box 86 \ 3 scan0021 | |
| Modifications and testing of the Bentley silencer suspension system. | 27th Jul 1933 | Box 86 \ 3 scan0022 | |
| Modifications to the 3.5 litre Bentley Exhaust Cutout. | 2nd Aug 1933 | Box 86 \ 3 scan0023 | |
| Issues with the exhaust cutout on a 3½ Litre Bentley, specifically rattling, wear, and exhaust gas impingement. | 2nd Aug 1933 | Box 86 \ 3 scan0024 | |
| Modifications to the Bentley exhaust cutout to prevent it from fouling the equaliser shaft due to pipe expansion. | 8th Aug 1933 | Box 86 \ 3 scan0025 | |
| Tests on spring-based Bentley silencer suspension compared to rubber. | 25th Aug 1933 | Box 86 \ 3 scan0026 | |
| Directive on the correct procedure for tightening nuts on the Bentley exhaust system to allow for thermal expansion. | 9th Sep 1933 | Box 86 \ 3 scan0027 | |
| Modifications to the Bentley exhaust system, comparing steel springs with rubber fittings and requesting a trial. | 11th Sep 1933 | Box 86 \ 3 scan0028 | |
| Tests of the Bentley exhaust system to determine clearance between the rear axle and the tailpipe on rebound. | 25th Sep 1933 | Box 86 \ 3 scan0029 | |
| Exhaust pipe clearance under the back axle for a Bentley. | 25th Sep 1933 | Box 86 \ 3 scan0030 | |
| Confirming the manufacture of a Bentley exhaust system and researching austenitic steels for its parts. | 29th Sep 1933 | Box 86 \ 3 scan0031 | |
| Blueprints for replacement springs for the 3 1/2 Litre Bentley exhaust cut-out. | 5th Oct 1933 | Box 86 \ 3 scan0032 | |
| Issue of exhaust fumes entering the car body from the Bentley exhaust system cut-out and proposing a redesign. | 16th Oct 1933 | Box 86 \ 3 scan0033 | |
| Modifications and material changes for the Bentley exhaust system. | 17th Oct 1933 | Box 86 \ 3 scan0034 | |
| Instruction to fit new suspension parts to an experimental Bentley chassis for evaluation. | 19th Oct 1933 | Box 86 \ 3 scan0035 | |
| Repeated exhaust manifold failures on test beds and a request for newly cast manifolds for further testing. | 9th Nov 1933 | Box 86 \ 3 scan0036 | |
| Blueprint showing a modification to the end ports of a Bentley exhaust manifold. | 9th Nov 1933 | Box 86 \ 3 scan0037 | |
| Standardisation of parts for an exhaust tail pipe suspension, using springs instead of rubber. | 2nd Nov 1933 | Box 86 \ 3 scan0038 | |
| Standardisation of the exhaust cut-out operating mechanism spring. | 2nd Nov 1933 | Box 86 \ 3 scan0039 | |
| Failure on the Bentley exhaust system and a recommended modification. | 25th Nov 1933 | Box 86 \ 3 scan0040 | |
| Testing of a Bentley exhaust system sliding joint. | 4th Dec 1933 | Box 86 \ 3 scan0041 | |
| The incorporation of modified exhaust and silencer parts into Bentley production. | 15th Dec 1933 | Box 86 \ 3 scan0042 | |
| Clarifying the materials and clearances for a Bentley exhaust system. | 18th Dec 1933 | Box 86 \ 3 scan0043 | |
| Clarifying the materials and clearances for the Bentley exhaust system. | 19th Dec 1933 | Box 86 \ 3 scan0044 | |
| The Bentley exhaust system sliding joint, clearing it for 10,000 miles. | 19th Dec 1933 | Box 86 \ 3 scan0045 | |
| The failure of a mild steel exhaust downtake pipe and the subsequent switch to Staybrite steel for production. | 1st Feb 1934 | Box 86 \ 3 scan0046 | |
| Standardisation of parts report for a sliding joint in the front expansion box. | 20th Dec 1933 | Box 86 \ 3 scan0047 | |
| Standardisation of lagged exhaust parts in Staybrite. | 20th Dec 1933 | Box 86 \ 3 scan0048 | |
| Proposal to redesign the Bentley exhaust system by removing flanges to prevent distortion during welding. | 27th Feb 1934 | Box 86 \ 3 scan0049 | |
| Modification to the Bentley exhaust system and its implications for repair service and manufacturing. | 28th Feb 1934 | Box 86 \ 3 scan0050 | |
| Design and practicality of a Bentley exhaust system, proposing a three-section construction. | 28th Feb 1934 | Box 86 \ 3 scan0051 | |
| Request to supply a complete Bentley Exhaust System with specific welding instructions for a 10,000 mile car. | 14th Mar 1934 | Box 86 \ 3 scan0052 | |
| Issues and potential improvements for exhaust systems, specifically concerning the Terraplane mounting. | 26th Apr 1934 | Box 86 \ 3 scan0053 | |
| Request to construct an experimental Bentley exhaust system to test varying pipe diameters for E.R. Hall's car. | 30th May 1934 | Box 86 \ 3 scan0054 | |
| Confirming the dispatch of an exhaust system from a Chevrolet car. | 30th May 1934 | Box 86 \ 3 scan0055 | |
| Confirmation of receipt and testing of an exhaust system. | 4th Jun 1934 | Box 86 \ 3 scan0056 | |
| Request to modify schemes to fit a flexible exhaust system mounting on car 3-B-IV. | 29th Jun 1934 | Box 86 \ 3 scan0057 | |
| Modifications to the Bentley Flexible Exhaust Suspension. | 26th Jul 1934 | Box 86 \ 3 scan0058 | |
| Request to build a revised Bentley flexible exhaust system for a 4-B-V chassis. | 1st Aug 1934 | Box 86 \ 3 scan0059 | |
| Depot sheet concerning a complaint of Bentley exhaust downtake pipes burning away due to the material used on early chassis. | 3rd Aug 1934 | Box 86 \ 3 scan0060 | |
| Issues with fumes from the Bentley exhaust cut-out and experiments to find a solution. | 4th Sep 1934 | Box 86 \ 3 scan0061 | |
| Tests to overcome exhaust fumes entering a Bentley by extending the exhaust cut-out pipe. | 4th Sep 1934 | Box 86 \ 3 scan0062 | |
| Blueprint drawing of a Bentley exhaust cut-out. | 4th Sep 1934 | Box 86 \ 3 scan0063 | |
| Specification memo for a lightened exhaust system, detailing weight savings from using thinner gauge steel. | 12th Oct 1934 | Box 86 \ 3 scan0064 | |
| Material gauge modifications for components of a 5-E-IV exhaust system's rear silencer. | 25th Oct 1934 | Box 86 \ 3 scan0065 | |
| Exhaust System deleting flange between front expansion box and cut-out. | 5th Oct 1934 | Box 86 \ 3 scan0066 | |
| Cost estimate and production note for jigs, tools, and equipment for the 'D.2' series chassis. | 18th Sep 1934 | Box 86 \ 3 scan0067 | |
| Modification to the Bentley silencer to address a 'tinny' exhaust sound. | 26th Nov 1934 | Box 86 \ 3 scan0068 | |
| Additional new parts for a Bentley tinny exhaust silencer assembly. | 27th Nov 1934 | Box 86 \ 3 scan0069 | |
| Introducing lagging on the intermediate exhaust silencer for a Bentley 'C' series chassis. | 3rd Dec 1934 | Box 86 \ 3 scan0070 | |
| Difficulties in standardizing lagging on an intermediate silencer for a Bentley. | 10th Jan 1935 | Box 86 \ 3 scan0071 | |
| Modifications to the intermediate silencer and lagging on Bentley cars. | 16th Jan 1935 | Box 86 \ 3 scan0072 | |
| Requesting a trial of a modified Bentley exhaust system on a specific chassis. | 21th Jan 1935 | Box 86 \ 3 scan0073 | |
| Modifications for the lagging of an intermediate silencer on a Bentley. | 21th Jan 1935 | Box 86 \ 3 scan0074 | |
| The experimental fitting of lagging for a Bentley's intermediate exhaust box. | 28th Jan 1935 | Box 86 \ 3 scan0075 | |
| Instruction to build and fit a lagged intermediate exhaust box to a Bentley chassis. | 1st Feb 1935 | Box 86 \ 3 scan0076 | |
| Modifications for weight reduction on Bentley Intake & Exhaust Systems. | 22th Feb 1935 | Box 86 \ 3 scan0077 | |
| Letter to The Southwark Manufacturing Co. Ltd. enclosing a drawing for the manufacture of 6 Corra-Joint Washers for a Bentley Exhaust Manifold Joint. | 25th Feb 1935 | Box 86 \ 3 scan0078 | |
| Comparison of performance between a standard front expansion chamber and the Hs.1585 model. | 28th Feb 1935 | Box 86 \ 3 scan0079 | |
| Performance graph comparing three different front exhaust expansion chamber configurations on a Bentley B.2 Unit. | 30th Jan 1935 | Box 86 \ 3 scan0080 | |
| Standardisation of parts for the lagging of the intermediate silencer. | 30th Nov 1934 | Box 86 \ 3 scan0081 | |
| Estimation of the cost and production viability for introducing extra jigs and tools for the 'C' series chassis. | 7th Dec 1934 | Box 86 \ 3 scan0082 | |
| Outlining the complete requirements for a modified exhaust system. | 25th Mar 1935 | Box 86 \ 3 scan0083 | |
| Request to build an experimental rear expansion chamber for a Bentley exhaust system and fit it to chassis 1-B-IV. | 27th Mar 1935 | Box 86 \ 3 scan0084 | |
| Blueprint for a Rear Expansion Chamber for a Bentley. | 27th Mar 1935 | Box 86 \ 3 scan0085 | |
| Request to make and fit a modified tail pipe for a Bentley exhaust system to car 1-B-IV. | 5th Apr 1935 | Box 86 \ 3 scan0086 | |
| Letter to The Southwark Manufacturing Co. Ltd. regarding the testing of 'Corru-Joint' Exhaust Washers on a 3½ litre Bentley Chassis. | 8th Apr 1935 | Box 86 \ 3 scan0087 | |
| Letter from The Southwark Manufacturing Co. Ltd. regarding the 10,000 mile test of 'CORRUJOINT' Exhaust Washers. | 9th Apr 1935 | Box 86 \ 3 scan0088 | |
| Modification to an expansion box for an exhaust system following a failure. | 26th Apr 1935 | Box 86 \ 3 scan0089 | |
| Letter from a supplier discussing the specifications of cupro-nickel joint rings for an exhaust pipe. | 1st May 1935 | Box 86 \ 3 scan0090 | |
| Request for a replacement straight through pipe in Staybrite steel following a failure during a 10,000-mile test in France. | 10th May 1935 | Box 86 \ 3 scan0091 | |
| Altering the exhaust system on car 3-B-IV to accommodate Girling brakes and address noise issues. | 10th May 1935 | Box 86 \ 3 scan0092 | |
| Letter to a supplier acknowledging receipt of modified exhaust manifold joint rings for testing and reporting. | 14th May 1935 | Box 86 \ 3 scan0093 | |
| Requesting the fabrication of a new exhaust pipe from a casting for an experiment. | 29th May 1935 | Box 86 \ 3 scan0094 | |
| Progress of obtaining a Staybrite exhaust pipe for GWH. | 29th May 1935 | Box 86 \ 3 scan0095 | |
| Standardisation of parts for exhaust manifold washers in nickel. | 9th Aug 1935 | Box 86 \ 3 scan0096 | |
| Cost estimate for extra jigs and tools and confirmation of production starting with the first 'F' series chassis. | 15th Jul 1935 | Box 86 \ 3 scan0097 | |
| Standardisation of Stellited Exhaust Valves. | 16th Aug 1935 | Box 86 \ 3 scan0098 | |
| Cost analysis comparing an old and new part, including an estimate for extra equipment. | 16th Jul 1935 | Box 86 \ 3 scan0099 | |
| Request to build one rear expansion box for a Big Bore Bentley exhaust system. | 11th Nov 1935 | Box 86 \ 3 scan0100 | |
| Requesting the production of one rear expansion box for a Big Bore Bentley Exhaust System. | 15th Nov 1935 | Box 86 \ 3 scan0101 | |
| Requesting the construction of a custom Bentley exhaust system for testing purposes. | 19th Nov 1935 | Box 86 \ 3 scan0102 | |
| Specification for the Big Bore Bentley exhaust system. | 19th Nov 1935 | Box 86 \ 3 scan0103 | |
| Blueprint of an experimental rear silencer for a Bentley. | 19th Nov 1935 | Box 86 \ 3 scan0104 | |
| New drawings and replacement parts for the Large Bore Bentley exhaust fittings. | 22th Nov 1935 | Box 86 \ 3 scan0105 | |
| Notification of alteration to blueprints for an Expansion Box and Front Silencer Assembly. | 22th Nov 1935 | Box 86 \ 3 scan0106 | |
| Exhaust fittings for a Large Bore Bentley, referencing earlier correspondence and new blueprints. | 25th Nov 1935 | Box 86 \ 3 scan0107 | |
| Request to send an official order for the re-enamelling of 2 Bentley Exhaust Manifolds. | 28th Nov 1935 | Box 86 \ 3 scan0108 | |
| Letter arranging for the enamelling of sand-blasted exhaust manifolds for road testing on Bentley cars. | 28th Nov 1935 | Box 86 \ 3 scan0109 | |
| Analysis of B.HP loss on a big bore Bentley exhaust system. | 29th Nov 1935 | Box 86 \ 3 scan0110 | |
| Letter from Lane & Girvan Ltd. regarding the enamelling of two exhaust manifolds for Bentley cars. | 29th Nov 1935 | Box 86 \ 3 scan0111 | |
| Modifications to a Bentley, including raising the exhaust pipe and a new wiring tube. | 30th Nov 1935 | Box 86 \ 3 scan0112 | |
| Instruction to hold up work on the Bentley exhaust system rear silencer. | 3rd Dec 1935 | Box 86 \ 3 scan0113 | |
| Letter from Lane & Girvan Limited regarding an order for two 'Bentley' Exhaust Manifolds, confirming price and delivery. | 5th Dec 1935 | Box 86 \ 3 scan0114 | |
| New drawings and a parts list for the Large Bore Bentley exhaust tail pipe. | 6th Dec 1935 | Box 86 \ 3 scan0115 | |
| The decision to continue using the standard exhaust system for the Big Bore Bentley car. | 9th Dec 1935 | Box 86 \ 3 scan0116 | |
| Letter to Fescol Limited regarding the Fescol system as an alternative to Staybrite for preventing corrosion in exhaust systems. | 16th Dec 1935 | Box 86 \ 3 scan0117 | |
| Letter from FESCOL LIMITED confirming a meeting with the Experimental Department. | 17th Dec 1935 | Box 86 \ 3 scan0118 | |
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