This kits contents have been specifically compiled to overhaul the front and rear brakes (not the master cylinder) of TR3 and 3A s fitted with a braking system as follows: -
Original fitment: From Comm. No. TS33647 to TS56376 Wire Wheels and TS56383 Disc Wheels only.
None split Callipers with symmetrical disc pad hold down plates (later callipers were split and had an offset 1/4UNF hold down screw), 10" x 2 -1/4" rear brakes operated by a ¾" wheel cylinder with a flat toped (as opposed to a cylinder with a slotted top.
If this does not match what is fitted to your car please let us know and we will substitute the correct parts.