Brand New 25D4 Distributor with a Pertronix unit Installed. Never change points again! No more trying fix your old worn out distributor. The distributors 100% new, slip on vacuum, Heavy Duty Ignition Rotor and a complete Pertronix unit, all you need is a distributor cap of your choosing. the 25D4 fits all MGA, MGB to 1974, Sprite, MG Midget to 1974 and Triumph TR3, TR4 and TR4A. Positive Ground version.