Whats a bored out throttle body?
The throttle body is the device which regulates air into the engine via the gas pedal. By enlarging it’s size you can allow more air to flow through (hence more power) Be careful removing too much material. Currently JG Engine Dynamics, RC Engineering, Bullfrog GUDE, and AEM perform the boring. Expect a gas mileage decrease too. A bigger throttle body helps aggressive cams idle better. In fact some cams require a bored throttle body. Throttle bodies allow more air flow across the board, so you should see an increase in power across the RPM board of about 3-5hp. Throttle bodies should lean out air/fuel ratio so you shouldn’t have a smog problem.
