Bonez HF cat...Which one?
 

on rx7.com I found these two Bonez cats. What's the difference?
Just 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.
3" converter shown.

3" Bönez Performance Converter (Blank)
Price: $250.00

The exhaust heat produced by a rotary engine is much higher than that of a conventional piston engine. This created quite a problem for us in our quest for an aftermarket catalytic converter that could perform up to our demanding expectations. After trying nearly every aftermarket cat available, we found that they all use a standard type suspension material around the ceramic converter brick. This material is not designed to endure the tremendous heat of the rotary exhaust which causes it to fail prematurely. Once the suspension material has overheated and broken down, the ceramic converter brick is left loose to rattle inside the case. The loose ceramic brick eventually causes its own self destruction, increased backpressure, and excessive noise.

After extensive research and development, we are proud to present the Bönez catalytic converter. Unlike other aftermarket catalytic converters, the Bönez unit uses a stainless steel mesh suspension element that surrounds the large, high flowing converter brick. This suspension element is built to withstand extreme termperature demands, and provide many miles of dependable performance. The case is also constructed of stainless steel for better durability, and incorporates a unique design which causes the inlet exhaust gases to spread evenly over the brick for better flow, improved efficiency, longer life, and reduced noise. This item fits between your stock precat or performance downpipe and will bolt directly to the stock catback system or any other aftermarket catback system. The Bönez kit also is much lighter than the stock unit it replaces and noise levels are only slightly increased. Please also note that the oxygen supply tube from the air pump is still retained, making this system 100% bolt on.

Bönez 3" Stainless Steel Main Converter
Price: $495.00 $420.75


Edit: nevermind looks like these are for the FD