My shifter is moving back and fourth when i come off of the gas. I allready have KB shifter bushings. Do i need a tranny mount or an STi gruppe n dog bone mount? Or is it soemthing completly different?

like how much back and forth? You will get more vibrating up into the shifter with the bushings. In fact just a FYI the more bushings / stiffer mounts you throw onto your car the more vibration and noise inside the car your going to be able to feel/hear.

its not so much vibration. It feels liek the entire tranny is shifting under acceleration/deceleration. I would say the shirter moves about 3/4- 1 inch foward to back

Check your motor and tranny mounts.

Check your motor and tranny mounts.
+1

Engine/tranny mounts are what shift and cause the shifter to move around while driving...

Check your motor and tranny mounts.

Are there gruppe n tranny mounts available, and if so how much vibration do they send into the car?

Are there gruppe n tranny mounts available, and if so how much vibration do they send into the car?
Group-N, and no not much vibration (NVH)

Group-N, and no not much vibration (NVH)

Thanx, i appreciate all the info