New UK Made 4 degree ignition advancer. CNC machined for 100% accuracy.. Simple fitment,just swap the SPS 4 degree advancer for the standard ignition rotor,located behind the rh ignition cover. No other modifications needed. The result is more midrange response and torque.We have been supplying these advancers for many years with excellent results. See our other listings for many more suzuki performance parts we stock and produce.