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Hybrid Racing PRB FWD Coolant Port Adapter for RSX/EP3/CR-V

In stock
Regular price $149.99
Product INFO
  • Vendor Hybrid Racing
  • SKU HYB-CPA-01-06
In stock
Usually ships within 24 hours
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  • Compatible with DC5 RSX, EP3 Civic Si, and CR-V
  • Fits PRB Style Heads on K20A, K20Z1, and K24A1 Engines
  • Deletes Idle Air Assist Valve (IAAV)
  • Works with -16 ORB to Barbed Hose or -16 AN Fittings

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

The factory coolant outlet on a PRB head is a cluttered piece of hardware, and it drags the idle air assist valve along with it. This adapter replaces the whole arrangement with one compact billet housing that cleans up the back of your motor, deletes the idle air assist valve, and gives you a proper -16 ORB outlet to plumb however you want. Machined from a single piece of 6061 and finished in black anodize.

Deletes The Idle Air Assist Valve

The idle air assist valve mounts to the factory coolant port; on a built or swapped engine it's usually just clutter. Installing this housing removes it from the equation entirely.

Put Your Coolant Temp Sensor Where It Belongs

There's a 1/8-inch NPT port machined into the top of the housing, a clean, purpose-built spot for a coolant temperature sensor. Not using it? Cap it with the included plug.

It Seals With Rubber, Not RTV

A precision-machined pocket accepts an OEM-style rubber seal, so you get a proper mechanical seal the way Honda designed it, no RTV required.

Keeps The Thermostat Bypass Circuit

This adapter retains the factory thermostat bypass circuit, so coolant flows correctly 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 standard factory-style radiator hose, or thread in a -16 ORB AN fitting for AN line. A threaded heater hose fitting is included.

What's In The Kit

  • Billet coolant port adapter
  • OEM-style sealing gasket
  • Mounting hardware
  • -16 ORB to hose barb radiator fitting
  • Threaded heater hose fitting
  • Plug for the 1/8" NPT sensor port

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), plus swaps.