MSD 6BTM Series Multiple Spark Ignition Controller w/ Boost Timing Master 57950BK 480" outside diameter and

480" outside diameter and

650 in Body

additional lightweight advance springs and an adjustable vacuum advance are included for those who like to custom tune for extra power and throttle response

1973-1977 Pontiac Catalina

Strange Engineering Aluminum coil overs

MSD 6BTM Series Multiple Spark Ignition Controller w/ Boost Timing Master 57950BK 480" outside diameter andThe 6 BTM is ideal for engines with a turbo or supercharger. Not only will the engine benefit from MSD's full power CD sparks, but there is also an adjustable boost timing retard circuit to prevent detonation. When your turbo or blower forces the air fuel mixture into the engine, the cylinder pressure inside the combustion chamber increases. The result is a great increase in power but this can also lead to detonation that can result in severe engine