Finally a Heavy Duty Blue Expoxy Ignition Rotor for the 45D4 and the 45D6. With todays high engery ignitions a heavy duty rotor is needed that will not ground through. Fits MGB 1975 to 1980, MG Midget 1975 to 1980,Triumph Spitfire 1975 to 1980, Triumph TR7 1975 to 1980 and Jaguar 1980 to 1987. JLM9623 DRB104 DRB104HD