If you find your holley equipped rx7 stalls on sudden deceleration a holley universal dashpot will function just like the factory one on a nikki. This will slow the return to idle when you remove your foot from the accelerator pedal and help prevent stalling on sudden stops. It will also hold rpm briefly which will improve shifting. Here is the link to the part http://www.holley.com/11-4.asp Holley has a few different brackets to mount it.

Here is a video of its function on my car.

http://www.youtube.com/watch?v=zJuzhLorW1A