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LS Engine Swap M12 1.5 Adapter to 1/4 NPT Coolant Temperature Sensor Water LS1 LSX LS3

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Male M12-1.5 to Female 1/4"-18 NPT Adapter

This adapts SBC/BBC 1/4" npt coolant temperature sensors to fit into LS series cylinder heads

  • Compatible with: all GM LS Series Engines
  • Made in Wichita, Kansas from aerospace grade, USA produced, billet aluminum
  • Includes: 1 aluminum adapter, 1 sealing washer
  • Will fit sensors with 1.0" length, measured from probe tip to the outer edge of adapter.

More Information

Manufacturer Part Number 551734
UPC 657814754287
Weight 0.066000
ICT Manufacturer ICT Billet
United States United States
Length Inches 2
Width Inches 1
Height Inches 1

WARNING - This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to


ALUMINUM: Most of the aluminum alloys used today contain some level of lead, usually less than .1%. Lead is known to the state of California to cause cancer and reproductive harm. Most aluminum alloys are physiologically inert in their solid form, and the lead is contained within, however user-generated dust and/or fumes may pose a hazard if inhaled or ingested. Heating beyond a certain temperature may also provide avenues for exposure.


STEEL (steel bolts):  Steel is an iron alloy with several metals including Nickel and Chromium. Both Nickel and Chromium are known to the State of California to cause cancer and reproductive harm, respectfully. This warning applies to stainless steels as well.