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MicroDynamics rev limiters now offer digital accuracy and reliability in an even smaller package. “Softcut,” the next generation of the proven “Smoothcut” technology, eliminates backfiring and reduces drive train stresses. The DRL3 features Full Throttle Gear Change circuitry to allow shifting without lifting the throttle. This new rev limiter can be easily calibrated at the track by holding the engine at half the required RPM -- the limiter stores twice that value as the selected limit. Compatible with most single-coil breaker point, electronic, and engine management ignition systems; not compatible with capacitive discharge (CD) ignitions including the MSD 6A Ignition.