UPDATE: I did notice a gain in the throttle responce a little bit but enough to notice it. You can feel it the difference if you took your time with it. Nothing to big but at least i got something out of it. Tiny Bit of acceleration and more throttle responce.
Note: Doing this mod was really easy. The only hard part is taking that b**** out lol. I Did it while my car is on the lift. Take off the tire, Then the wall (5mm i believe) and the bottom where its located (easier access). Then there is 1 bolt (10mm) then once thats out its loose, (The hard part ----> I yank mines out but you can use a long fat flat head =D.
If you going are planning to put a Cold Air Intake, This part has to come out.
For me, ill say its worth it.