PH +64 9 262 0777

8 Manu st
New Zealand

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Custom Engine Builds 

At HRE we look to challenge the standards of our engineering with every build, whether this be in engine design, quality control or customer service. We are continuously learning and improving how we approach every new build with our on going development. Please email us your request and we can begin to peace together your next engine project.

Please look at our Race Programs page for info regarding build processes and what we can offer.


Here are some examples of our work   

Toyota 1UZ

Ground up HRE developed custom built engine to suit SNZ rules. This development process involved every engine components top to bottom, from dry sump systems, intake manifolds, port design and flow, piston/rod/stroke ratios and orientation, every aspect looked into and understood. With many days on the dyno the learning in this project has taught the HRE team valuable lessons that we now bring into every new build. 

  • 510HP 380ftlbs in restricted form. 

  • Click Here for more details on complete build specs

  • Dyno video link below

4AGE NA small port head package

​Getting the complete HRE treatment this 4age head package was built around a broad usable power curve, taking advantage of the small port head we selected a valve that worked well with the port cross sectional area retaining air speed and velocity as pulling through from low rpm right through the rev range was requested. 


  • Over size valves 

  • New Inserts to suit valve size 

  • High flow seat cut 

  • Bronze guides 

  • Ti retainers 

  • Double valve springs 

  • Hand ported and polished