I'm planning to do it to my car this sat,... i have noticed when the car is cool - lots of power,.... but when warm, it loses power. The cai helped a little but i need to do the tb bypass, and i think changing to a lower temp thermostat will help more,....zeke24 said:honestly, it doesn't do much Kris, I just did it. I dont really feel any performance gains.... However, it does focus a tad bit more coolant directly in the engine so the car might run a few degrees cooler, also the upper intake (plenum) should feel cooler than it did before since that hot coolant isn't running through the TB and warming that area which in turn can increase the temp. of the incoming air. I bypassed mine. It just makes removing the TB all the easier. While you're at it go get some throttle plate cleaner and clean your TB out till it's nice n' shiny.