I was looking at getting Professional Products 75mm TB/plenum kit on ebay for $240 bucks. I was wondering if its worth getting with my setup. I have seen many of the posts about TBs and plenums and most people say to get LTs, intake, exhaust, or 4.10s. But i already have all of those and i just got a set of subframe connectors. If i do get, will i see more gains with all of the other things ive done to my car? im looking to get my car to do mid 13s, will i see it with this. im already doin 13.8 & 13.9s.