Grannas Racing Rotary (13B/20B) Tremec 56 Magnum Swap Kit

Now available, my 13B/20B rotary kits are the latest additions to my popular lineup of GR-Series transmission kits for import cars. This kit is designed for the Mazda FD3S RX-7 but I do have plans to make a FC3S kit and a FB RX7 kit as well! 

When i first tried to build this kit i discovered the quicktime bell was less than ideal. Their bellhousing was not deep enough for the GM input shaft, and it also had some other fitment issues. I worked with them to make changes and now we have a good bell that fits well.

These kits are designed to be a bolt-in affair, with only minor modifications needed to get the transmission installed. In the video below I try to show how really well this kit fits into the FD3S tunnel. 

These Rotary 13B-20B GR700 transmission kits are available with the highest quality Aluminum or Carbon Fiber driveshafts from the Driveshaft Shop. These shafts include a Sonnax billet 1350 slip yoke. The driveshafts are available for both the stock FD rear as well as those running the Ford 8.8" rear end swaps.

Here is a video overview of the first kit installed in my personal 13B engine FD Rx-7.