Aluminum Upper Coolant Housing for K24/K20Z3 Engines (No Filler Neck)
High-quality aluminum upper coolant housing designed for K20Z3 and most K24 cylinder heads (except K24A1). Engineered for performance builds, it improves coolant flow, fitment, and reliability under high-performance conditions.
Features a -16OR outlet and -12OR filler inlet for optimal cooling efficiency. The pivoting hose outlet allows up to 15 degrees of adjustment, making installation easier on custom setups. Available with three hose outlet options: standard 1.25-inch radiator hose, or optional 12AN and 16AN fittings.
Compact design provides additional clearance for sidewinder-style turbo manifolds. Optional filler neck available to relocate the radiator cap higher on the engine for better bleeding and cooling system performance. Compatible with OEM Honda Civic 92–00 radiator caps.
Can be paired with a swivel neck thermostat and water pump block-off plate for a complete K-series cooling setup. Not compatible with K24Z or K24Y engines and may interfere with Jackson Racing supercharger systems.
- Choosing a selection results in a full page refresh.
- Press the space key then arrow keys to make a selection.
- Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device
