LS Stainless Steel Steam Vent Kit - Black

• Routes trapped steam and air from LS cylinder heads to improve coolant flow

• Block-off adapters accommodate varying steam port counts across LS head designs

• Fits Gen III/IV LS small block V8s, 4.8L through 7.0L — verify port count first

• Braided stainless steel hose with aluminum housing for durability and heat resistance

This steam vent kit routes trapped steam and air away from LS cylinder heads, helping maintain consistent coolant flow and reduce localized hot spots that can contribute to overheating or detonation. Braided stainless steel hose connects to an aluminum housing, with O-rings and mounting hardware included for a complete installation. Available in natural and black finishes.

Steam vent port count and location vary across LS cylinder head designs, so this kit includes block-off adapters to accommodate that variation. Verify your specific heads' port count and thread size before installation — hose ends use 1/8" NPT fittings, and thread size can differ between factory and aftermarket LS heads. This kit vents the cylinder heads only; it does not include or replace the thermostat or water neck housing.

Cylinder Head Compatibility
Fits Gen III/IV LS small block V8 cylinder heads across the 4.8L to 7.0L displacement range. Because steam vent port count and location vary between LS head designs — factory and aftermarket alike — this kit includes block-off adapters so unused ports can be sealed rather than left open, letting one kit accommodate multiple head configurations.

Installation
Confirm your cylinder heads' steam port thread size matches the kit's 1/8" NPT fittings before ordering, since thread size can vary between factory and aftermarket LS heads. O-rings and mounting hardware are included; block off any unused ports with the included adapters to maintain proper sealing.

Will this fit my specific LS cylinder heads?
Fitment depends on your cylinder heads' steam vent port count and location, rather than a specific LS engine code. This kit includes block-off adapters to accommodate different LS head configurations, so verify your steam-port layout before installation.

What if my heads have fewer steam ports than the kit provides for?
The included block-off adapters allow unused steam ports to be sealed, accommodating LS cylinder heads with different steam-port configurations.

Does this kit include a thermostat or water neck?
No — this kit is for cylinder-head steam venting only. A thermostat and water neck or thermostat housing must be sourced separately if your cooling system doesn't already have them.

What's the difference between this kit and TSP's Crossover Steam Vent Kit?
This kit uses individual adapters and block-offs to accommodate varying LS head steam-port configurations. TSP's Crossover Steam Vent Kit uses a five-branch manifold to consolidate the steam lines. Choose based on your cylinder-head configuration and preferred routing.

What thread size are the hose ends?
The hose ends use 1/8" NPT threads. Verify compatibility with your cylinder heads or adapters before ordering, particularly with aftermarket heads.

Is this available in a finish other than black?
Yes — this kit is also available in a natural finish.

Do I need any additional hardware to install this kit?
No — O-rings and mounting hardware are included with the kit.