On a 03 cobra, I have yet to see a twin screw cobra trap 168-170. I have seen the coyotes do it. I guess with the newer motors its easier, but, if you want to compete, make power easier, no pulley swaps, I would go turbo. I guess I am still stuck in the 03 cobra days where we swapped out 5 different blowers to just stay within the same power level.