actually it has shown to produce more than the Disco Potatoe (DP) specs, so you may buy a DP, but it will not flow as good as the GT25R/T25R with a stage 1 upgrade by MPNick...
of course, you could get the DP and then have it worked, but that would cost you, yet even more money....
so in the end the GT25R/T25R is a better option in my opinion, especially for those who have MSP's since you already have the T25R, pay the $580 to nick send him your exhuast manifold, turbo and S pipe and in turn end up with one fast ******* ride!!!