For those of you considering getting DP and especially if you have an exhaust setup already,personally you wont regret one bit by adding the DP,the only thing you will realize is what exactly you have been missing out on,personally i was in the same position,ordered my Corsa cat back in 1/14 and two weeks later ordered the DP cause the sound and performance was just not there with only the Exhaust setup,know with the complete setup not only will you notice better performanceand better sound,your going to love hearing those turbos spool everyday,and for me personally felt like i was driving a new car.just my 2cent.