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LS Coolant / Steam Port Crossover Hose Kit (LS1 Throttle Body Bypass)

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Coolant Crossover Hose Kit

Used to simplify the plumbing of the steam ports in the Chevy LS cylinder head

  • Compatible with all GM LS series engines
  • Includes: 4 orings, 4 bolts, 2 threaded coolant ports, 2 plugs, and 1 steel braided hose
  • Made in Wichita, Kansas from aerospace grade, USA produced billet aluminum
  • Can be installed on the front or rear of the cylinder heads
  • Compatible with thread sealant on hose fittings (NOT included)
  • Compatible with factory style head bolts or ARP 12 point head studs

*not compatible with FAST 102 intake manifolds

More Information

Bullet Point 1 Also used to re-route hot engine coolant away from your throttle body for increased power
Bullet Point 2 Crossover hose connects cylinder heads at either end of the engine and plugs the remaining holes
Bullet Point 3 Made in Wichita, Kansas from aerospace grade, USA produced, billet aluminum
Bullet Point 4 Hoses and adapter ports have 1/8" NPT tapered pipe threads on the ends which require pipe sealant
Bullet Point 5 Compatible with all LS series engines
Manufacturer Part Number 551692
UPC 682384790137
Weight 0.370000
ICT Manufacturer ICT Billet
United States United States
Length Inches 2
Width Inches 1
Height Inches 12
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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.