With simplified wiring and tuning flexibility, the FAST® EZ-LS™ Ignition Controller Kit delivers low cost and proven ignition control for any LS engine swap utilizing a variety of FAST® EFI setups. The kit works perfectly with FAST® fuel control systems including EZ-EFI 2.0® ®, XFI™ and XFI Sportsman™. It utilizes a simplified plug-and-play wiring harness and a compact, waterproof ECU enclosure that make clean, professional installation a snap. In addition, this kit was engineered to utilize stock LS crank and cam sensors to save money and installation time. Four LED lights indicate that the controller is powered up and receiving signals. The kit is designed to be extremely user-friendly by offering a quick setup option that doesn't require tuning or a laptop. However, for those that desire greater tuning control, the FAST® GM EZ-LS™ Ignition Controller Kit can be custom-tuned via the EZ-EFI 2.0® ® hand-held (when hooked up to an EZ-EFI 2.0® ® ECU) or XFI™ C-Com® software connected to an XFI™ system. It works with all 1997-Current GM coil-near-plug ignition systems and both 24x/58x tooth reluctor wheels. Not compatible with LS truck-finned coils.