DEFINED AUTOWORKS | Service Repair Upgrades | Performance for Mazda RX7 | RX-7

2-Rotor Services

We offer services for the 2-Rotor motors: 12A and 13B that improve its performance without compromising reliability. Several of our services will deliver high performance and yet still maintain driveability.

This page shows the services available for the 2 rotor 13B. If you are looking for a complete engine rebuild - go to our Engines category for 2 | 3 | 4 rotor engine builds.We offer a conversion kit for your RX7 that allows you to install a 3 rotor engine without chassis modifications.

13B Turbo Exhaust Port Service

2 Rotor 13B Turbo Exhaust Port Service
Street Port Service smooths the ports on your rotary and improves exhaust velocity from the chamber.

2 Rotor | 13B motor
$1,850

N/A Street Intake Port Service

N/A Street Intake Port Service
Street Port Service smooths the ports on your rotary and improves air/fuel velocity entry into the chamber. We have three port types, Velocity, Qualifier, and Circuit. Circuit port is our largest, and most ideal for top end. Velocity was developed for factory turbocharger engines needing fastest spool and highest boost. Qualifier is ideal for any engine, providing best midrange with better top end over stock.

2 Rotor | 12A or 13B motor
$350

N/A Street Exhaust Port Service

N/A Street Port Service
Street Port Service smooths the ports on your rotary and improves exhaust velocity from the chamber.

3 Rotor | 20B motor
$300

Semi P-Port Service

Semi P-Port Service
Wanting serious power? Look no further than Semi P-ports. Used on top rotary drag racers to develop over 1000 rear wheel horsepower, these are a great choice for many setups. We have sucessfully made 428 rear wheel horsepower with our naturally aspirated non-turbo 20b using semi P-ports.

2 Rotor | 12A or 13B motor
$500 per housing

Rotor Scalloping Service

Rotor Scalloping Service
Rotor Scalloping opens the port earlier delivering more torque, especially at low to mid RPM and lowers weight of the rotor.