EVIL ENERGY LS Stainless Steel Coolant Crossover Steam Vent Kit – Black 4-Corner LS1 LS2 LS3 LS6 LS7 LSX

Four-Corner Steam Vent Design for LS Engines

Many factory LS configurations use front steam vent connections with the rear cylinder head ports blocked off or configured differently depending on engine generation.

The EVIL ENERGY four-corner crossover kit is designed to connect both front and rear steam vent locations where the cylinder heads support the required installation.

By providing an evacuation path from multiple points in the cylinder heads, the system can help reduce trapped vapor and localized air pockets.

This can be particularly valuable in custom cooling systems where radiator placement, hose routing, and engine installation angles differ from the original vehicle configuration.

Important: A steam vent kit does not replace a functioning radiator, thermostat, water pump, cooling fan, or properly designed cooling system. It also does not guarantee lower engine temperatures or eliminate overheating caused by other mechanical problems.

304 Stainless Steel Lines and CNC-Machined Aluminum Manifold

The EVIL ENERGY LS coolant crossover kit uses 304 stainless steel tubing to provide durable steam vent connections.

Stainless steel offers good resistance to corrosion and high-temperature coolant exposure, making it a practical choice for long-term engine cooling applications.

The included CNC-machined aluminum manifold features a black anodized finish for corrosion resistance and a clean appearance.

This combination provides an attractive alternative to improvised rubber hose and generic fitting arrangements commonly seen on custom LS swaps.

Compatible with Popular Aftermarket LS Intake Manifolds

The EVIL ENERGY LS steam vent kit is advertised for use with several popular aftermarket intake manifold designs.

Intake manifold compatibility is based on the supplied manufacturer description. Individual intake variants, throttle body arrangements, fuel rails, and accessory layouts may affect clearance.

Important Gen IV Truck Intake Restriction

This kit is specifically listed as incompatible with Gen IV truck intake manifolds.

Even if the engine itself is an LS-family V8, intake manifold clearance can prevent proper installation of the crossover tubes.

Always confirm the installed intake manifold rather than relying only on the engine displacement or RPO code.

EVIL ENERGY LS Steam Vent Kit Engine Compatibility

The kit is designed for compatible GM LS-family cylinder heads with suitable steam vent locations.

Fitment note: Not every LS-family cylinder head or intake configuration accepts the same steam vent hardware. Verify steam port locations, rear port accessibility, manifold clearance, and connection routing before ordering.

Ideal for LS Engine Swaps and Performance Builds

The EVIL ENERGY LS steam vent crossover kit is suitable for many custom LS applications, including:

• Chevrolet Camaro and Corvette LS engine upgrades

• GM 5.3L and 6.0L truck engine swaps

• LS-swapped Nissan 240SX and 350Z builds

• LS-swapped Ford Mustang projects

• Chevrolet C10 and classic truck conversions

• LS-powered drift and road-racing cars

• Turbocharged and supercharged LS builds

• Custom hot rods and off-road vehicles

Engine swaps frequently involve relocating radiators, modifying coolant hoses, and changing the position of the engine relative to the cooling system.

A properly routed steam vent connection is an important part of designing a reliable LS cooling system.

EVIL ENERGY LS Stainless Steel Steam Vent Kit Specifications

LS3 and L92 Rear Steam Port Installation Notes

Certain LS3 and L92 cylinder heads have factory-installed aluminum plugs blocking the rear steam vent locations.

The manufacturer notes that these plugs may require removal to install a four-corner steam vent system.

Depending on the cylinder head configuration, removal may involve accessing the plugs from below or carefully drilling them.

Critical installation warning: Do not enlarge the steam port openings or allow metal shavings to enter the engine’s internal coolant passages.

Removing rear steam port plugs can require cylinder head access and specialized procedures. If the heads are installed on the engine, consult an experienced LS engine builder before attempting removal.

Improper drilling or plug removal can damage the cylinder heads or contaminate the cooling system.

How to Install the EVIL ENERGY LS Steam Vent Kit

1. Allow the engine to cool completely and safely relieve cooling system pressure.

2. Disconnect the battery and drain coolant as required for the installation.

3. Identify all four cylinder head steam port locations.

4. Verify intake manifold clearance and confirm that the kit matches the engine configuration.

5. Inspect rear steam port plugs and determine whether removal is necessary.

6. Prepare the steam port mounting surfaces and inspect the supplied O-rings and shims.

7. Install the pre-labeled driver-side and passenger-side stainless steel crossover tubes.

8. Attach the supplied fittings and aluminum manifold according to the manufacturer’s instructions.

9. Route the steam vent outlet to the correct cooling system connection.

10. Refill the cooling system, bleed trapped air, and inspect all connections for leaks.

Use PTFE tape only on connections specifically approved for thread sealing. Do not apply it to AN flare fittings or O-ring-sealed connections.

Where Should an LS Steam Vent Line Connect?

The steam vent outlet must connect to a suitable cooling system location that allows trapped air and vapor to escape without creating an unintended restriction.

The correct connection depends on the radiator design, surge tank arrangement, pressure cap location, and cooling system configuration.

Common custom LS installations use an appropriately designed radiator steam port or pressurized surge tank connection.

Avoid routing steam vents to an unsuitable non-pressurized overflow bottle without confirming the cooling system design.

Does a Four-Corner LS Steam Vent Kit Prevent Overheating?

A properly installed four-corner steam vent system can help evacuate trapped air and vapor from the cylinder heads.

However, it cannot compensate for inadequate radiator capacity, incorrect thermostat operation, water pump problems, or insufficient cooling airflow.

The greatest benefit is supporting proper coolant circulation and vapor evacuation in compatible LS engine installations.

For additional cooling system information, read our Cooling System Upgrades for Turbo Cars technical guide at My Pro Street Online.

Buy the EVIL ENERGY LS Stainless Steel Coolant Crossover Steam Vent Kit at Pro Street Online

Complete your LS cooling system upgrade with the EVIL ENERGY LS Stainless Steel Coolant Crossover Steam Vent Kit in Black.

Featuring corrosion-resistant 304 stainless steel lines, a black anodized aluminum manifold, pre-labeled crossover tubes, and installation hardware, this kit provides a convenient solution for compatible four-corner LS steam vent plumbing.

Whether you’re building a street-driven LS swap, upgrading a performance V8, or designing a custom cooling system, EVIL ENERGY offers a practical alternative to assembling individual crossover components.

Shop LS engine cooling upgrades and performance parts at Pro Street Online.