The second version is a "universal fit", single O2 sensor kit. It can be used on any vehicle that has a PCV installed on it. It comes with a single O2 sensor, "cut to length" sensor cable, control module, O2 sensor and "weld on bung".
This Autotune Universal kit is designed for twin cylinder motorcycles/ATVs that use the Power Commander V allowing control of two cylinders simultaneously. The kit includes two sensors and PCV connection harness.