With simplified wiring and tuning flexibility, the EZ-LS delivers proven ignition control for LS engine swaps It works perfectly with EZ-EFI 2.0, XFI 2.0 and XFI Sportsman and utilizes a simplified plug-and-play wiring harness and compact, waterproof ECU. This kit was engineered to use stock LS crank and cam sensors and doesn?t require tuning. For those that desire greater tuning control, the EZ-LS 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 2.0 system. Nominal dimensions: 6"W x 3.5"H x 1.5"D