Knocking/Popping on front drivers side.
Hello everyone. I have been lurking for awhile before buying my first WRX. I bought a 2002 wrx that has a cat-less up pipe, down pipe and full exhaust. CAI and lightweight pulleys. I have been driving it for 2 days and this morning (Sunday) while driving to work a knocking sound started in front of my feet (pedals) and has been doing it since. My first thought was CV axle or bearing but it only makes the noise while coasting. Under acceleration, deceleration, braking and turning it makes no noise. Only while coasting with the wheel straight. It does sound rotational. The faster I go the faster the popping sound gets. And vice versa with going slow. I am at a loss with what it could be and I searched all over the site looking for an answer that someone may have already posted elsewhere. No such luck. I appreciate any input that you guys can throw my way. Thanks in advance.