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Your cart is empty.Z Whip M12 1.5 To 3/8” NPT Standard Length LS Coolant Temperature Sensor Adapter made to Adapt the Factory LS M12-1.5 Female Coolant Sensor Port to a 3/8” NPT Older Style Mechanical or Electric Temp sensor. Normally used when swapping an LS engine into something that originally had an SBC or BBC to retain the factory or aftermarket temp probe or sensor that needs 1” depth or shorter for the sensor. Compatible with all LS Series Engines 1997-2014 (GEN. III/IV small block chevy) Adapter has Male M12x1.5 thread and female 3/8” NPT threads (3/8” NPT is approx. 11/16” od). This will thread into the driver side of the cylinder head near the front or the passenger side cylinder head near the rear. Comes with sealing washer and adapter. Proudly made in the USA from aircraft grade billet aluminum.