When I am in gear and let off the gas and get down to a lower RPM, my car jerks back and forth pretty bad. Does this sound like a tuning issue? The clutch is almost brand new so I dont think it is that. It seems like it started after I replaced my cat with a test pipe. Any help would be greatly appreciated.

 

Is it an Exedy HD? Mine is very pushy.

 

i have this same issue...i have an exedy clutch, not sure exactly which model, it was put in before i bought the car