productstechnical articlescontact usracing calculatorsracing informationnews archivesearch

 

 













Exhaust Info
Upgrading the exhaust system on a rotary engine car has always proven to be the easiest way to increase performance. When upgrading the system, you want to improve flow as much as possible for maximum power. If you drive the car on the street, then you must have a catalytic converter, otherwise you’ll get the biggest power gains from a racing system.

1979-1980 Model
During the RX-7’s first two years, Mazda used thermal reactors instead of catalytic converters to meet the emissions standards. Because of the lack of an air pump and other assorted hardware required for using a catalytic converter, we do not offer a street-legal replacement for these year models.

1981-1985 12A Models
Beginning in 1981, Mazda moved to using catalytic converters and did away with the thermal reactor system. Since the converter technology was very new at the time, the systems were very restrictive and sapped power from the engine. Replacing these converters with a high flowing unit or a racing pipe is one of the best things you can do to help engine longetivity, increase performance, and increase gas mileage.

1984-1985 13B Models
The limited quantity GSL-SE, with its 6-port 13B engine, had an exhaust system similiar in many ways to the 12A model but unlike the 12A models, it utilized exhaust backpressure to open up additional ports on the intake manifold for high RPM operation. When upgrading to a high flow system, it’s important to address this difference properly. All Bönez systems have provisions to help make the 6-port system work properly.

 

RP Performance Muffler The RP Performance Mufflers are designed with performance and sound quality in mind. They exactly replace the stock muffler and bolt directly to the stock connecting pipe. The dual chrome tip design is aggressive yet retains the original stock styling. Sound levels are up only slightly from stock but sound quality is MUCH improved with a deeper growl. Durability issues have also been addressed by constructing the muffler with heavy wall materials and stainless steel wool packing. Overall, this is the best all around muffler we’ve ever used on the 1st generation RX-7.

RP Performance Muffler

dyno chart

 

 

Bönez Superflo SystemThe Bönez Street Exhaust Systems utilize an ultra high temperature, high flow catalytic converter that has been specifically designed to handle the high exhaust temperatures the rotary engine produces. These systems simply bolt up to the stock exhaust manifold and connect to the stock or aftermarket cat back exhaust systems.

Bönez Performance Converter System

dyno chart

 

 

Bönez 2.5" Race PipeWe also offer the Bönez Main Cat Race Pipe which replace just the main catalytic converter with a straight pipe. This unit makes it extremely easy to swap between the stock cat and racing pipe for extra HP for track events yet still remain legal for the street.

Note: Not be legal for street use in some states. Racing use ONLY!

Bönez Race Pipe

dyno chart

 

 

Blank ConverterJust what’s needed for your custom RX. These catalytic converters are the same quality units used in their direct bolt in systems. Recognized as the freest flowing and most durable of all the catalysts, you simply can’t go wrong with Bönez. Available in a variety of pipe sizes.

Bönez Performance Converter (Blank)

dyno chart
Bolt and Gasket Kit

dyno chart

 

© 2004 Rotary Performance, Inc. All Rights Reserved. Please direct comments or concerns here.