I just wanted to make a PSA: DO NOT buy the K&N air filter for the 987. It does not fit. I fiddled with that stupid thing after installing my GT3 plenum for about an hour and there was no way to install it. I returned it and ordered a BMC air filter. The BMC came in and popped right into place in a matter of minutes. The build quality of the BMC is much nicer as well. Very impressed. I will be a BMC customer from now on after using K&N for years.