I have looked into the porting and it runs like 500 bucks for a dune/drag port. I am building this bike mainly for sand mountain, and it feels like you could always use more power in that deep dry sand. I just cant see paying that much for a port job, when for 900 you could buy a cub. I understand there is other things to buy for the install, but there is for the port job as well. And also, I know that t-5's are not considered drag pipes, but my god, you make it sound like the cub wont even work at all with them. I am not trying to run a de-tuned cub motor, I am just trying to get one going for around $1500. I am sure it will be "pipey" and have a "powerband" but WTF thats why I bought a banshee and not a 450. I also read on here that it would be very hard for anybody to do a port job that would make as much power as a cub right from the box. I am not trying to argue, "I just wanna go fast" I dont want to spend three grand.........p.s. I have the tools knolwledge and friends to do any of the tear down/install work down to the crank.