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Hybrid Racing PRB RWD Coolant Port Adapter for K20A/K20Z1/K24A1

In stock
Regular price $149.99
Product INFO
  • Vendor Hybrid Racing
  • SKU HYB-CPA-01-07
In stock
Usually ships within 24 hours
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  • Compatible with RWD K Swap Chassis
  • Fits K20A2, K20A3, K20Z1, and K24A1 Engines
  • Works with -16 ORB to Barbed Hose or -16 AN Fittings
  • Uses OE-Style Rubber Gasket

Hybrid Racing RWD PRB Coolant Housing Adapter - K20A, K20A2, K20A3, K20Z1 & K24A1

Put a K-series in a rear-wheel-drive chassis and you find out fast how little room there is between the back of the head and the firewall. This adapter turns the radiator outlet out the side of the cylinder head instead, so you get your firewall clearance back and a more sensible path for your hoses. Compact, machined from a single piece of 6061, and built specifically for RWD conversions.

Read This First: You Need An RWD Intake Manifold

Because the radiator outlet exits from the side of the cylinder head, this adapter is not compatible with standard front-wheel-drive K-series intake manifolds; the outlet will interfere with the throttle body. It must be used with a rear-wheel-drive-specific intake manifold that provides clearance for the side-exit outlet. If you're on a factory FWD manifold, our standard PRB coolant housing adapter is the one that fits.

Put Your Coolant Temp Sensor Where It Belongs

A 1/8-inch NPT port machined into the top of the housing gives your coolant temp sensor a proper home, ideal for standalone ECU and aftermarket gauge setups.

It Seals With Rubber, Not RTV

A precision-machined pocket accepts an OEM-style rubber seal for a proper mechanical seal against the head, no RTV.

Keeps The Thermostat Bypass Circuit

Retains the factory thermostat bypass circuit so coolant circulates properly during warm-up.

Run Factory Hoses Or Go Full AN

The outlet is a threaded -16 ORB. Use the included hose barb fitting for a conventional radiator hose, or thread in a -16 ORB AN fitting for AN line.

What's In The Kit

  • Billet coolant port adapter
  • OEM-style sealing gasket
  • Mounting hardware
  • -16 ORB to hose barb radiator fitting

Fits These PRB-Head K-Series Engines

K20A / K20A2 / K20A3 (2002-2006 Acura RSX), K20A3 / K20Z1 (2002-2005 Honda Civic Si EP3), K24A1 (2002-2006 Honda CR-V), in rear-wheel-drive conversions (S2000, 240SX, BRZ, BMW 3 Series, Miata, and similar). Requires a rear-wheel-drive-specific intake manifold.