Tractuff Water Pump/Block Fitting for Honda K Series

TracTuff Water Pump/Block Adapter Fitting – Honda K Series

The TracTuff Water Pump/Block Adapter Fitting is a versatile cooling solution for Honda K Series engines. Available as either a -6 AN adapter fitting or a block-off plug, this fitting provides a clean and reliable way to modify or delete the factory coolant lines used with the OEM oil cooler. Whether you are simplifying your setup, adding a water-cooled accessory, or rerouting coolant flow, this adapter gives you full control of your K-series cooling circuit.

Each fitting is machined from U.S.-milled 6061 aluminum for exceptional strength and precision. The backside features an O-ring register that seals perfectly using a Genuine Honda O-ring to ensure a leak-free fit. The design allows the same part to fit both the block and the water pump, making it easy to order a matching pair for your project. If you want to completely eliminate the coolant hoses, choose the block-off version. For custom cooling setups, the -6 AN male flare fitting is ideal for plumbing water-cooled accessories such as turbochargers or heat exchangers.

These adapters allow coolant to flow correctly by creating a complete circuit, rather than routing two high-pressure ports together. The block-side fitting is used as a feed, while the water pump-side fitting acts as a return. This ensures proper coolant movement through your accessory and prevents pressure buildup. If your K-series build does not use the OEM oil-cooled water pump, you can complete the coolant loop with a TracTuff Thermostat Port Adapter. For builds retaining the heater core, a simple T-fitting can integrate the bypass line into the system.

Key Features

• Available as a -6 AN fitting or block-off adapter
• Compatible with all Honda K Series engines
• Machined from high-quality 6061 aluminum
• Fits both the block and water pump ports
• Includes stainless steel button head bolt and Genuine Honda O-ring
• Allows custom coolant routing or oil cooler delete
• Ideal for turbo or accessory water feed and return applications
• Made in the USA with precision machining and durable construction