Kit includes TCFI plug in fuel injection controller, USB interface for PC, software, WEGO IID dual channel wide band exhaust gas oxygen sensor interface, two Bosch LSU 4.2 wide band exhaust oxygen sensors and two 18 x 1.5mm weld nuts for exhaust pipes Utilizes high end Alpha-N fuel control to eliminate any dependence on manifold pressure; unaffected by long duration and high overlap camshafts User-friendly PC Link software with 3-D graphics and easy spreadsheet editing capabilities for quick cell block changes Easy to install by simply replacing stock ECM and O2 sensors with those included in kit; detailed instructions included Programmable user outputs for functions such as shift light, nitrous activation and electric shifter Offers real-time and continuous auto-tuning with monitoring, control and override capability Built in data logging that helps you diagnose real world problems Supports all sensors including theft and security module Made in the U.S.A.. CONTROLLER TCFI GEN 6