What's your general opinion of them? Used one? Seen or felt any noticeable results? I've got some money to throw around on some bolt-ons, so I'm curious what, if any, appreciable gains could be seen from one.

 

holly has some good stuff and edlebrock isn't bad either, but you'll want to put on headers and a bigger exhaust to really get any noticible performance out of a new throttle body. i'm looking to do the same thing to my 96 Z.

 

A TB spacer is useless...Go for a new lid or some exhaust components. You're not going to get any good power difference from a TB spacer, or even a bigger TB for that matter until you have some internal mods, especially on an LS1.