THUNDERMAX 1022-0039 309-355 Replacement ECM Oxygen SensorFeatures Easy installation: replace the factory ECM, install new O sensors and harness, load the correct map for your bike, and ride Replacement oxygen sensor for Thundermax ECM auto tune system Made in the USA Notes Because of possible clearance issues, some aftermarket exhaust systems may require modifications or relocation of their Oxygen sensor port bungs. WARNING DISCLAIMER: Not legal for sale or use in California on any pollution controlled
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