I assume I would have to remove the piece containing the restrictor in order to take it out it, right? This would require disconnecting that small black tube on the side. I'm relatively new to this car, and I'm not totally sure what that tube does. Is it safe to remove? And if it is, how would one go about removing it?gary680 said:Here's a picture of my engine with an illustration of where the restrictor would be. If you took off the tube that connects the air box to the throttle body, it is directly inside there, and visible. I used a hacksaw blade and cut mine out cleanly. Wash out the rest with water to get rid of any pieces that might be left behind.