If your looking for more data input and more control over your engine combination then the secondary oxygen sensor kit is what your looking for. This will improve the additional AFR data collection and allow the ECU to run in bank-to-bank closed loop AFR control. The secondary LSU4.9 wide band sensor is installed on the header 2 side of the GEN4 ECU.
Provides one wiring harness and one Bosch LSU4.9 wide band oxygen sensor. Harness is pre-terminated with all connectors and labeled for all connections.
Parts Included: One wiring harness. One LSU4.9 wide band oxygen sensor