This box provides more spark than factory ignition. 535 volts of primary voltage with spark energy reaching up to 135millijoules! The multiple sparks of the 6AL-2 burn in the cylinder for 20 degrees of crankshaft rotation to ensure complete combustion.Two more great features are the rev limits! There are two rev limiters; one for high end overrev protection and another you can activate off a clutch or transbrake to set a launch limit. This feature will help your car blast off the starting line! Adjustments are made via four rotary dials for 100 rpm increment control!The all new capacitive discharge ignition will easily connect to nearly any 12-volt negative ground distributor system.