Don't know my friend got one in his VS, thinking of getting one in my VT but what are real benefits of getting one, besides the ever so slight extra power it apparently adds to your car.
If it's not forced induction or a V8 you wont notice much power increase at all. But depending on which one you use it will provide you with colder air, which is better for the engine, and does give better power at the wheels.
Many with V6 engines enjoy the sucking sound it produces too! :P Thats a bonus i guess