No i have not. i really dont care for that stuff, it looks like it puts strain on your car. i dynoed it once before the turbo and it was 377.6rhwp and 322.4 ft-lbs torque, after the turbo i dont know probably more. ps. i dont race my car so im not into 1/4mile races, dynoes, etc. i just want a reliable high performance car. i cant afford a viper, ferrari's, or lamborghini so i buy the next best thing 300zxTT!