GM LS Engine Coolant Crossover Delete Kit - Natural

• Blocks unused LS coolant crossover ports for simplified cooling system routing

• Installs on front or rear crossover ports — confirm your head's port location first

• Fits Chevrolet Gen III/IV LS small block V8s, 4.8L through 6.2L

• Aluminum construction handles coolant system heat and pressure; natural finish

This LS engine coolant crossover delete kit blocks off factory-style coolant crossover ports when simplifying or reconfiguring the cooling system, giving a cleaner engine bay layout by eliminating unused crossover plumbing. Aluminum construction is built to handle coolant system heat and pressure, with a natural finish suited to LS engine bays and swap applications.

This kit fits LS cylinder heads with standard front and/or rear coolant crossover port locations and installs on either position. On LS3/L92-style heads, the rear crossover port is already factory-blocked with an aluminum plug, so only the front port block-off from this kit is needed in that case. This is a simple port block-off, not a multi-port hose or network kit — confirm that distinction matches your intended use before ordering, since full crossover network kits carry different, intake-manifold-specific fitment considerations.

Cylinder Head Compatibility
Fits Chevrolet Gen III/IV LS small block V8 heads across the 4.8L to 6.2L displacement range. Port location varies by head design — some LS heads have both front and rear crossover ports open, while LS3/L92-style heads already have the rear port factory-blocked, meaning only the front block-off applies in that case.

Installation
Confirm which crossover port(s) on your specific heads are open before ordering, since installing this kit is only necessary at open, unblocked ports. This is a straightforward port block-off rather than a full crossover hose network — no additional intake manifold routing is involved.

Do I need this kit if I have LS3 or L92 heads?
Possibly only partially — LS3/L92-style heads already have the rear crossover port factory-blocked, so only the front port block-off from this kit would be needed on those heads.

Is this a full crossover hose delete kit, or just a port block-off?
This is a simple port block-off, not a multi-port hose or network kit. Full crossover network kits carry different, intake-manifold-specific fitment considerations that don't apply here.

Will this fit both front and rear crossover ports?
Yes, it's designed to install at either the front or rear crossover port location, depending on which ports are open on your specific heads.

Why would I delete the coolant crossover?
It's commonly done when simplifying or reconfiguring a cooling system away from the factory crossover routing, often as part of a custom build or LS swap.

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