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Killer B Motorsport High Flow Water Pump Housing V2 Raw 2002-2014 WRX / 2004-2014 STI

Original price $139.00 - Original price $139.00
Original price
$139.00 - $139.00
Current price $139.00

Killer B’s Water Pump Housing is a much more robust design. Designed using state of the art 3-D CAD software to assure maximum flow with minimum turbulence for the best performance possible!

  • 3D CAD designed
  • Made from Cast Aluminum
  • Smooth Taper Inlet for Turbulence Free Flow
  • Bead Assures Proper Hose Connection
  • Large Smooth Bend Transitions into the Housing with Maximum even Flow
  • Machined Flange for a Leak Free Install

Customer Reviews

Based on 4 reviews
John R
Staying cool

Doing a radiator upgrade so figured I'd do this at the same time. The part is straight forward and fits great.


Thank you for leaving a 5 Star Review! We are glad to hear that the High Flow Water Pump Housing from Killer B Motorsports was a perfect addition to your radiator upgrade. It is great to know that the installation was straightforward and the fit was perfect. We appreciate your support and hope you continue to enjoy a cooler ride!


Smoother delivery

I picked up Killer B’s pump housing because I was installing some key reliability mods on my ‘19 STi. Install was a breeze! Just two bolts. Of course I replaced the one-time-use thermostat gasket while installing to ensure a proper seal for the smooth delivery of coolant. If you’re replacing your coolant hoses and radiator, might as well pick this piece up as well!


It is fantastic to hear that you had a smooth experience installing the Killer B Motorsport High Flow Water Pump Housing V2 on your '19 STI! The straightforward installation with just two bolts and the decision to replace the one-time-use thermostat gasket for a proper seal is commendable. Upgrading to this high-flow water pump housing is a wise choice, especially when performing other reliability mods and replacing coolant-related components. Ensuring a smooth delivery of coolant is crucial for optimal engine performance and preventing overheating. With this upgrade, you can enhance your STIs cooling efficiency and maintain its reliability even under demanding conditions. Thank you for sharing your positive feedback and for your 5 Star Review! Enjoy the improved performance of your STI and happy driving!


Reviewer avatar
Michael Niehoff
Killer B never fails!

When I got it, it surprised me how much bigger it was then the OE one. it does work with OE size lower hose. if you haven't done or planned it i would recommend replacing the thermostat, and seal with OE products. the product bolts right up and is super easy! also remember to use blue coolant in your EJ!!
Difficulty 2/10
time 2/10
tools 1/10


We appreciate your 5 Star Review of the Killer B Motorsport High Flow Water Pump! As you said the installation process is easy and with all Killer B products it is a solid piece and work well with the OE size lower hose! Your recommendation to replace the thermostat and seal with OE products is also helpful advice for those considering this upgrade! It is clear that you have done your research and know your stuff when it comes to maintaining your car. Thank you for your review!


collin bleiler
Great product

Compared to stock side by side there is a huge difference currently doing a complete maintenance revive on my ej255 but after all done will give temp differences and a in depth review


We Appreciate your 5 Star Review! Killer B Motorsports has done extensive testing and truly knows how to build their products for the best performance! The High Flow Water Pump Housing is one of those products that maximizes flow!


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