This is a Brand New 25D4 Distributor. No more trying fix your old worn out distributor. The distributors 100% new, slip on vacuum, points, condenser and Heavy Duty Ignition Rotor 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. If you need a unit with a Pertronix unit installed us part # 25D4P