i live in pa not too far from GER and Dynamic. had a GER and don't know if they are still around. i have the dynamic in for a while now in a low 10sec duster with a 440. it flashes around 5200 to 5400. no issues and i just had it updated after it was about 6 years old. only thing i can compare it to is the GER and well i'm sure the ger would slow my car down but i neverbroke it. and i call it old faithfull.