Back in the early 80's the idea to add a humbucking pickup to a Stratocaster* caught fire. In response to that demand, EMG released two pre-wired combination systems, the SA/SA/81 and the SA/SA/85. Since then they've added just about every conceivable combination you can think of, including the EMG-S/S/81, and they're all available factory pre-wired. Since all EMG's use the Quik-Connect system you can change your system at any time without any soldering.