Here's the deal...I have a 98 cobra with pullies, CAI, big MAF, MSD coil packs, shorties, catted x, magnaflow cat back...now, I had basically the same set up on my 89 when I added a 65 MM throttle body, and I couldnt tell a bit of difference thru the butt dyno...would I notice it on the cobra if I add a 62 MM throttle body (stock now)?...they are expensive, and if im not gonna get a noticeable gain...Im not buying one...thoughts?

 

Throttle response might see a little increase, but it's not like adding nitrous or anything.

The 4.6 is all about systems...well, motors in general. For each item you add to the intake "system" your other components become more efficient. So although the t/b might only add 2hp by itself, when you have EVERYTHING done to your intake, then add your t/b you will be gaining more than just that 2hp.