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#91717629
$42.99
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Universal Fit, 1.50" Outside Diameter, Straight Angle
| MFG. Part # | 91717629 |
| Brand | Speedway Motors |
| Overall Length | 5.88" |
| Angle | Straight |
| Material Type | Aluminum |
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Return PolicyThere’s no doubt that one of the reasons the LS swap is so popular in GM muscle cars is that the overall cost to do the swap is relatively low. We didn’t say cheap, but it is certainly a cost conscious way to go when you need to repower your classic GM muscle car or truck. Though grabbing a salvage yard Vortec 4.8 or 5.3, cleaning it up, and adding a few necessary items like swap headers and engine mounts will get your new to you LS under the hood, there are several other aspects of the swap to consider, such as the cooling system.
Unlike the older SBC or BBC, the LS engine family features a thermostat that is in the water pump housing. While this design allows for temperature and flow to be regulated before the coolant enters your engine, having the thermostat at a low point means that any air in the cooling system can easily get trapped in your engine. Air bubbles in cooling passages disrupt coolant flow, create hot-spots, and can cause overheating issues, pre-ignition, and detonation. Fortunately, there are steam ports in the heads that allow this trapped air to flow away from critical cooling locations to a high point outside of the cylinder heads. Since these engines utilize a closed pressurized cooling system, the steam tubes must be connected back into it at some point.
A swap specific aluminum LS radiator is generally considered a must have item for the LS swap to be successful. The LS radiator is designed to mount like the stock radiator but features the proper steam port connection and a smaller upper radiator hose bung to function properly with the LS engine. This is great if you have no radiator to put back in the car, or perhaps your radiator is junk, and you need to buy a new one anyway. However, there are plenty of LS swappers that have a perfectly functioning radiator in their GM muscle car and would rather spend their LS swap dollars elsewhere than an expensive LS radiator swap. Enter the Speedway Motors LS Steam Port Radiator Hose Adapter, a runner-up for the 2020 SEMA Best New Street Rod/Custom Car Product Award!
Our LS swap radiator hose adapter solves several issues related to the LS swap cooling system hose routing configuration without looking like you spent a weekend in the plumbing section of your local hardware store. No one wants to see brass NPT fittings cobbled together to make the LS water pump outlet hose connect to your original radiator. Not to mention the more fittings you use the greater chance of leaks or parts failure due to vibration.
Our budget-minded hose adapter provides a clean and simple solution. It features one 1.25-inch end to match the LS engine’s water pump outlet, along with a 1.5-inch end to match the upper radiator inlet on standard GM-spec radiators. This solves the two different hose ID issue, but we went a step further and added an integrated streamlined 1/4-inch 90-degree hose barb fitting for the LS engine’s factory steam line port on the block. This provides an LS steam vent radiator hose solution that simply attaches inline in the upper radiator hose.
No longer do you have to consider having your radiator modified for a steam line port or use some clunky fittings to create a LS steam vent radiator hose setup in your upper radiator hose. To top it off we use a black powder coat finish to blend the LS swap radiator hose adapter in with your rubber radiator hoses for an OE look that just fades away under hood. Pick from our dozens of cooling hose and tubing options to finish your LS swap cooling system hose routing and you’ll be that much closer to twisting the key on your fresh LS swapped ride.
| KEY SPECS | |
|---|---|
| MFG. Part # | 91717629 |
| Brand | Speedway Motors |
| Overall Length | 5.88" |
| Angle | Straight |
| Material Type | Aluminum |
| GENERAL | |
| Outside Diameter | 1.50" |
| Finish | Black |
| Sold in Quantity | Each |
| Hose End Size | 1-1/2" to 1-1/4" |
4.9
24 Reviews
Customers appreciate the functionality and quality of the product, which consistently meets expectations and fits perfectly with various applications. It is recognized for its practicality, particularly in facilitating intricate engine replacements and LS swaps. The product's ability to work with original components is highlighted favorably, often being described as a brilliant solution for complex plumbing problems. Further, its exact fit and role in seamlessly connecting the steam port to cooling systems are noted. Buyers frequently express intention to repurchase, demonstrating strong satisfaction. The product outperforms competitors, particularly where aftermarket steam vent kits fail. Its color and unobtrusive design also receive positive mentions.
4.9
24 reviews
5
23
4
0
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Most Liked Positive Review
5.0
no drilling no radiator changes fix
cant use most aftermarket steam vents kits sold but there are other hose adapters that have a npt port for that. this is more for the stock vents from factory. used simple 90 from water outlet leaving this coming up far side of air tube elbow and running vent hose under and hides it upper hose 90 of radiator and 90 to adapter running above air intake pipe. worked out perfect on ls2 vette motor in a 63 chevy c10 using the original champ radiator. motor mounted forward 2in and electric fan on radiator left little room even had to remote mount the power steering reservoir from top on engine to next to radiator. this fit perfectly and blends in well due to the black color.
Most Liked Negative Review
3.0
Buy again
Great to splice together smaller to larger radiator hoses for a clean looking outcome.
Filter by Ratings
Works great, decent price.
5.0
a year ago
Smokey
Texas
Verified
Used for an LS swap in an 84 C10. Used a factory LS truck hose on one side and factory c10 hose on the other. Works as designed and if I needed another in the future I'd buy one again.
Would Recommend
Buy again
3.0
a year ago
Dightonboy
Madison, Wi
Verified
Great to splice together smaller to larger radiator hoses for a clean looking outcome.
Would Recommend
Thanks
5.0
2 years ago
Ls Vega guy
Missouri
Verified
It was just what I ordered. I'm still at mock up stage on my LS swap
Would Recommend
Must have product for ls swaps
5.0
2 years ago
Steam port hose adapter
Victorville ,ca
Verified
I used this for my ls swap project on my 1972 nova
Would Recommend
Great product, great time saver
5.0
2 years ago
Andre
NY, NY
Verified
Great product, great time saver. Worked very well for my Ls swap.
Would Recommend
Good quality
5.0
2 years ago
Mole
Sioux Falls sd
Verified
Worked perfectly
Just what I needed
5.0
3 years ago
Rpc
Zachary la
Verified
Just as described
Would Recommend
Great Product
5.0
3 years ago
Dean
Canada
Verified
Works great and ties in with stock outlet from engine
no drilling no radiator changes fix
5.0
3 years ago
darren
las vegas, nv
Verified
cant use most aftermarket steam vents kits sold but there are other hose adapters that have a npt port for that. this is more for the stock vents from factory. used simple 90 from water outlet leaving this coming up far side of air tube elbow and running vent hose under and hides it upper hose 90 of radiator and 90 to adapter running above air intake pipe. worked out perfect on ls2 vette motor in a 63 chevy c10 using the original champ radiator. motor mounted forward 2in and electric fan on radiator left little room even had to remote mount the power steering reservoir from top on engine to next to radiator. this fit perfectly and blends in well due to the black color.
Would Recommend
Hose adapter
5.0
4 years ago
Bones
Central PA
Verified
My son was replacing the engine on my husbands 77 Chevy step-side. Worked great for what he needed.
Would Recommend
Showing 10 of 24 reviews
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