Category 3 Mini
Homologation paper no 5405
Permitted modifications as per the Homologation papers.
Engine.
998cc, 1275cc.
The "A" Plus cylinder block is not allowed
Cylinder Heads.
Arden 8 Port cylinder heads
12G940 casting 1275cc cylinder heads.
Electronic ignition.
Luminition Optronic replacement system.
Carburation.
Single Weber or Delorto. Split Weber configuration allowed. Twin 1.25, 1.5, 1.75 S U´s (Not later H I F type)
Three or Four syncromesh. Limited slip differential. Straight cut drop gears. (NOT Dog Engagement)
Electrics.
The starter motor must be of the inertia type. NOT pre engaged. The period modification was to fit a 10 tooth pinion as opposed to the 9, this gave a greater turn speed of the engine.
Brakes.
Front. Minifin brake drums. Solid 7.5 or 8.4 inch brake disc. Rear: Cast Iron or Minifin brake drums.
Tandem master cylinder. Adjustable brake pedal box. As long as it cannot be adjusted by driver or navigator when normally seated. The KAD adjustable pedal box assembly is acceptable.
The later Rover Mini assembly which incorporates an in line servo is also allowed
Suspension.
The original 2 bolt/stud tower subframe may be replaced by the later single large bolt type
Front. Adjustable Hi Lo´s. Solid negative camber bottom arms. Adjustable tie bars. (Not rose joints)
Rear. Adjustable Hi Lo´s. Non adjustable camber brackets.
Wheels and Tyres.
Ten or Twelve inch wheels with 70 profile tyres can be used.
General.
Fibre glass bonnet or boot lid. Perspex side windows.
Front and rear bumpers must be fitted.
Alloy centrally mounted replacement petrol tank.