| Model Years | Models Covered | Part Number | Piston Size | Cost |
| 1958-1962 | MGA Twin Cam
MGA Deluxe |
8777-14 | 2 1/4" | $219 |
| 8777-18 | 2 1/8" | $209 | ||
| 8778-34 | 1 3/4" | $209 | ||
| 8778-58 | 1 5/8" | $219 |
Standard size cylinders for the MGA's listed are 8777-18 on the front calipers, and 8778-58 on the rear. Oversize cylinders (8777-14 front, and 8778-34 rear) will provide approximately 10-15% greater force on the brake rotor, decreasing the required brake pedal pressure during braking, and potentially shortening stopping distances.
| HDC Part # | MG Part # | Item Description | Cost |
| 3824BV | Bleeder Valve | ||
| 316BPL | Left Side Bridge Pipe | $17.50 | |
| 316BPR | Right Side Bridge Pipe | $17.50 | |