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| Specification | Details |
| Brand | EVIL ENERGY |
| Fit Type | Vehicle Specific Fit |
| Engine Compatibility | Compatible GM LS series applications, including LSX, LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, and other listed LS engines |
| Not Compatible With | FAST 102 intake manifolds |
| Port Design | 2-port steam crossover layout connecting the upper cylinder head steam ports above cylinders #1 and #2 |
| Hose Material | Black cotton braided hose |
| Coolant Port Material | Aluminum alloy |
| Color | Black |
| Outside Diameter | 1.5 cm |
| Item Dimensions (L x W) | 10.4" x 1.8" |
| Included Components | 6 x bolts, 3 x coolant ports, 2 x plugs with O-rings, 1 x PTFE tape, 1 x black cotton braided hose, 1 x 1/8-27 NPT to 1/4" Hose Barb Fitting |
| Installation Location | Cylinder head steam ports above cylinders #1 and #2 |
| Heat & Corrosion Resistance | Aluminum alloy ports and black cotton braided hose designed for heat, coolant exposure, and corrosion resistance |

The EVIL ENERGY black 2-port LS coolant steam port crossover kit is designed for compatible GM LS series engines, including LSX, LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, and other listed LS applications. This LS steam port kit connects the upper cylinder head steam ports above cylinders #1 and #2 to help route trapped steam or air away from the cylinder head steam port area.
This kit includes 6 bolts, 3 aluminum alloy coolant ports, 2 plugs with O-rings, PTFE tape, and 1 black cotton braided hose. Before ordering, confirm your LS engine family, intake manifold clearance, steam port layout, hose routing, and cooling-system return path. This kit is not compatible with FAST 102 intake manifolds.



The EVIL ENERGY LS Coolant Steam Port Crossover Kit is built for compatible GM LS engine applications, including LSX, LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, and other listed LS engines. The 2-port design connects the upper cylinder head steam ports above cylinders #1 and #2, helping trapped steam or air move away from the cylinder head steam port area.
This type of LS coolant steam port crossover kit is commonly used on LS swaps and modified LS builds where coolant routing, intake clearance, and steam vent plumbing need to be checked carefully. Depending on your setup, it may be used as part of a throttle body coolant bypass-style routing configuration, but final routing depends on the vehicle build and cooling-system layout.
Fitment is important. This kit is not compatible with FAST 102 intake manifolds. Before installation, verify intake manifold clearance, steam port position, coolant return routing, hose path, and nearby heat or moving components.

This LS coolant crossover kit uses a black cotton braided hose and aluminum alloy coolant ports for use in engine-bay environments. The hose supports flexible routing around intake components, brackets, and accessory-drive areas, while the aluminum alloy ports are designed for coolant exposure and corrosion resistance.
The included plugs with O-rings help seal unused or required steam port locations when installed correctly. PTFE tape can be used where appropriate on threaded connections. Avoid over-tightening small coolant-port hardware, and inspect the system after the first heat cycle for coolant seepage, hose contact, or fitting movement.

Q: What does this LS coolant steam port crossover kit do?
A: This LS coolant crossover kit connects the upper cylinder head steam ports above cylinders #1 and #2 to help route trapped steam or air away from the LS cylinder head steam port area.
Q: Is this the same as an LS steam port kit?
A: Yes. Many users search for this type of product as an LS steam port kit, LS steam vent kit, LS coolant crossover kit, or LS coolant steam port crossover kit.
Q: Which engines does this kit fit?
A: It is designed for compatible GM LS series engines, including LSX, LS1, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, and other listed LS applications. Confirm your exact engine, cylinder head steam port layout, and intake setup before ordering.
Q: Is this kit compatible with FAST 102 intake manifolds?
A: No. This kit is not compatible with FAST 102 intake manifolds.
Q: Does this kit connect all four steam ports?
A: No. This is a 2-port LS steam port crossover kit designed to connect the upper cylinder head steam ports above cylinders #1 and #2. If your build requires front and rear four-corner steam routing, choose a compatible 4-port setup.
Q: Can this kit fix every overheating issue?
A: No. It can help route trapped steam or air, but overheating may also be caused by the radiator, thermostat, water pump, fans, coolant level, hose routing, air trapped elsewhere, or engine condition.
Q: What should I check before installation?
A: Check engine compatibility, steam port layout, intake manifold clearance, hose routing, fitting direction, sealing surfaces, coolant return location, and nearby heat or moving components.
Q: Do I need to bleed the cooling system after installation?
A: Yes. After installing an LS steam vent kit, bleed the cooling system, refill coolant as needed, and inspect for seepage after the first heat cycle.
| Policy | Details |
|---|---|
| Cancellation Policy | Orders can be canceled within 48 hours of placement. Refund processed in 3-5 business days. |
| Returns Policy | Returns accepted within 180 days. Full refund within 90 days; 15% fee for 90-180 days. |
| Non-Returnable Items | Only regular-priced items are eligible for refunds; sale items are non-refundable. |
| Refund Processing | If no refund received, check your bank/credit card. For ongoing issues, contact support@ievilenergy.com. |
Effective from August 25, 2024. Price drops within 7 days of purchase can be claimed.
EVIL ENERGY reserves the right to interpret, modify, or terminate this policy in accordance with applicable laws and regulations.
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