Filters
Pockets of air or vapor can form inside the coolant passages of your engine block, and if they get stuck in there, they can prevent proper coolant circulation, creating...
Pockets of air or vapor can form inside the coolant passages of your engine block, and if they get stuck in there, they can prevent proper coolant circulation, creating “hot spots” that can throw off your tune, or even cause premature combustion. In engines where the thermostat sits at the highest point of the cooling system, these bubbles can easily escape. On other engines—most notably the LS—the thermostat is positioned lower, so the bubbles need another way out. The LS solves this issue with steam ports on the top of the block where these bubbles can escape, and coolant crossover lines (also called steam lines or pipes)...
Pockets of air or vapor can form inside the coolant passages of your engine block, and if they get stuck in there, they can prevent proper coolant circulation, creating “hot spots” that can throw off your tune, or even cause premature combustion. In engines where the thermostat sits at the highest point of the cooling system, these bubbles can easily escape. On other engines—most notably the LS—the thermostat is positioned lower, so the bubbles need another way out. The LS solves this issue with steam ports on the top of the block where these bubbles can escape, and coolant crossover lines (also called steam lines or pipes) carry them to the radiator overflow tank.
If you’re upgrading the intake manifold of your LS engine, you’ll need to remove the factory coolant crossover plumbing. While you’re at it, might as well upgrade the crossover as well! Aftermarket steam line kits are more versatile, provide better flow for improved cooling, are easier to service later, and look great, too.
An aftermarket coolant crossover helps your high performance engine run at peak efficiency and safety, so make sure you’re getting the genuine article at Summit Racing Equipment. Our selection only includes brands we’d use on our own project vehicles, like Trick Flow, Earl’s Performance, and Holley, plus kits from our own Summit Racing brand.
LS Coolant Steam Crossover Kit 1, Billet Aluminum, -4AN Braided Stainless Hose, Bypass Hose Kit, W/ Vent Front, No Vent Rear, LS1, LSX, Kit
Part Number: SUM-220962
Estimated Ship Date: Today
Estimated Ship Date: Today
BUILD IT WITH SUMMIT!
Coolant Crossover, Billet Black Aluminum, -4AN Braided Stainles Hose, LS Throttle Body Bypass Hose Kit Coolant Steam Crossover, W/Vent, LS1, LSX, Kit
Part Number: SUM-220960-B
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Engine Coolant Crossovers, LS Steam Vent Kits, Aluminum, Black Anodized, Chevy, Small Block LS, Kit
Part Number: ICB-551837-LS01
Estimated Ship Date: Today
Estimated Ship Date: Today
LS Coolant Steam Crossover Kit 2, Billet Aluminum, -4AN Braided Stainless Hose, Bypass Hose Kit, W/ Vent Front, Billet Plugs Rear, LS1, LSX, Kit
Part Number: SUM-220963
Estimated Ship Date: Today
Estimated Ship Date: Today
Coolant Crossover, Billet Black Aluminum, -4AN Braided Stainless Hose, LS Throttle Body Bypass Hose Kit, NO Vent, Rear balance Crossover, Kit
Part Number: SUM-220961-B
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Engine Coolant Crossover, Tube, Adjustable from 6.8 in. to 10.5 in., -12AN O-Ring Ports, Billet Aluminum, Black Anodized, Chevrolet, LS, Each
Part Number: EAR-LS0037ERL
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Hoses and Pipes, Cooling System Crossover Line, 2011-2018 WK Grand Cherokee w/ 3.6L Engine;
Part Number: CWA-5184653AF
Not Yet Reviewed
Estimated Ship Date: Jul 21, 2025 if ordered today
Estimated Ship Date: Jul 21, 2025 if ordered today
Powerstroke Coolant Recircluation Kit
Part Number: APF-1039093278
Not Yet Reviewed
Estimated Ship Date: May 5, 2025 if ordered today
Estimated Ship Date: May 5, 2025 if ordered today
GASKET
Part Number: NAL-12623852
Not Yet Reviewed
Estimated Ship Date: Jul 7, 2025 if ordered today
Estimated Ship Date: Jul 7, 2025 if ordered today
Modal Header
Call To Order
This is a custom order part. You can order this part by Contacting Us.
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
Summit Racing™ Coolant Steam Port Crossover Kits SUM-220960-B
