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LS LS1 1/8"npt Coolant / Steam Port Adapters for Crossover Hose / Tube

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LS Coolant Crossover Ports

Compatible with: all GM LS series engines

  • Made in Wichita, Kansas from aerospace grade, USA produced billet aluminum
  • 1/8" NPT threaded holes to attach steel braided or other crossover tube fittings between the cylinder heads
  • Package Includes: 2 coolant ports, 2 orings and 2 bolts
  • Can be installed on the front or rear of the cylinder heads
  • Compatible with factory style head bolts or ARP 12 point head studs *not compatible with FAST 102 intake manifolds

    More Information

    Bullet Point 1 Conveniently upgrade your coolant steam ports with these universal 1/8" NPT adapters
    Manufacturer Part Number 551694
    UPC 682384790298
    Weight 0.180000
    ICT Manufacturer ICT Billet
    United States United States
    Length Inches 2
    Width Inches 2
    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.