K20 K24 K Series Direct Water Pump Mount V2 Swivel Neck Thermostat Housing 16AN

The K20 K24 K-Series Direct Water Pump Mount V2 Swivel Neck Thermostat Housing is designed to bolt directly onto the water pump housing, giving you a clean, no-adapter installation. With a -16AN port (compatible with 1.25" hose), switching coolant fittings is effortless — and the 360° swivel neck lets you rotate the outlet to perfectly suit your engine bay layout.

Key Features:

• Direct water pump bolt-on — simple, adapter-free fitment
• -16AN / 1.25" hose port — easy coolant fitting compatibility
• 360° swivel outlet — position the hose exit exactly where you need it
• Two 3/8 NPT ports (behind the thermostat) — for proper recirculation hose and heater core routing
• OEM-style warm-up design — coolant continues flowing from block to head even when the thermostat is closed, ensuring correct warm-up behaviour
• 1/8 NPT sensor port — for an optional coolant temp sensor (plug included)
• Pre-tapped blind fan switch port — not drilled through; simply drill the centre hole if you want to run a fan switch (already tapped, no plug needed)
• Thermostat included — Part #13958, 180°F opening temperature

Compatibility:

• Honda / Acura K20, K24, and K-Series engines
• Suitable for engine swaps, track builds, and street performance setups