Allows you to install a 3 wire heated oxygen sensor in place of a single wire sensor. Adapter plugs into your factory harness connector, and is simple to install. The black lead runs to the back of the cylinder head, and the pink/blk wire runs to a 12 volt source. These are assembled in house with new connectors, terminals, and seals from Packard, and TXL grade wiring. These are the same products used by GM on factory harnesses.
Manufacturer: TPI PARTS
Fitment: 85-92 305 TPI 85-92 350 TPI 88-92 305 TBI
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