| Engine – General | Part No. | Price £ |
| 12/4 Little end bolt | AC39 | 1.50 |
| 12/4 Big end nut | AC70 | 6 |
| 12/4 Big end bolt– long stroke | AC69 | 12 |
| 12/4 Big end bolt – early type– short stroke | | 12 |
| 12/4 Cylinder head studs (19 per set) – each | AC5 | 2.75 |
| 12/4 Cylinder head washers | | 0.07 |
| 12/4 Cylinder head nut | AC6 | 1.30 |
| 12/4 Cylinder head nut – long | AH38 | 4 |
| 12/4 Cylinder head gasket- English made | AC3 | 107 |
| 12/4 Valve, exhaust quality, collet type | AC41/AC61 | 25 |
| 12/4, 16/6 Valve spring | AC43,EE3 | 8 |
| 12/4 Valve guide | AC19 | 25 |
| 12/4 & 16/6 Engine front mount | AA60, EA55 | 44 |
| 16/6 Big end bolt | EE18 | 12 |
| 16/6 Cyl. head studs (24 per set) – each | ED6 | 3 |
| 16/6 Valve | EE1, EE2 | 27 |
| 16/6 Valve Guide | EE9 | 28 |
| 20/4 Head gasket | CEB6 | 110 |
| 20/4 Cylinder head stud | CEB59 | 3.70 |
| 20/6 Big end nut | DE22 | 4.75 |
| 20/6 Big end bolt | DE21 | 10 |
| 20/6 Cylinder head studs (25 per set) – each | DD6 | 3.70 |
| Compression tap | AC22,ED24,CEB27,DD29 | 28 |