I'm upgrading to a 13' TVS later this summer for my 12' GT500 and currently have a 2.5" pulley (smallest that would fit on the stock eaton). With a local dyno tune, I put down 572rwhp on a mustang dyno. I now have an o/r x-pipe as well. I was wondering if upgrading to a 2.4" with the TVS would be noticeable vs putting the 2.5" on the TVS. Also, I have the stock cai with frpp resonator delete and Airaid filter. I'm assuming I also need to upgrade to the JLT CAI?