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Photo is shown with optional custom intake manifold and waterpump. These can be added for additional cost.


Defined Autoworks has been building 4 rotor engines for over 10 years. Dont trust a startup company with a specialized setup like this, that does not have the experience needed.


The starting price point for a 4-rotor engine. Base pricing is a complete longblock with no intake assembly, no oil pan or ecu system. Equipped with a streetport, this setup is perfect for either turbocharging or naturally aspirated. Turbocharged potential is 1000hp with more being possible with extra services such as block strengthining. These accessories can be purchased separately at the time of order. Defined Autoworks 4 rotor engines are highly specialized, hand assembled and hand fabricated. Due to this and only one engine builder, the lead time is minimum 6 months. 

4-rotor 26b Streetport engine.

SKU: 102
6 months minimum wait time after order is placed.
  • All race engines carry no warranty, but will have a manufacture quality assurance. Any error in assembly will be repaired with no charge. Defined Autoworks is not liable for shipping costs or labor costs associated with install or removal. 

  • Cost does not include shipping. Shipping will be determined after purchase based on buyer location. A crate charge will also be added. Local pickup accepted with no additional charges. 

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