I went to the big summit racing store that is near Atlanta today, and I bought a Summit racing 52mm polished throttle body with built in airfoil. I have much better throttle response now, and you can hear it sucking in all that air. When I first started the Caddy I thought my air filter was going to get sucked in! At idle all you can here is air getting sucked in through the air filter, it's pretty bad ass! Also I got my ultra flow cat back system coming this week, and maybe some other goodies, hmmmm, maybe?