i've posted this about a month ago, but i'm gonna post it again to see if i can get my issue out to some new eyes. i've installed my cold air intake and followed everything that the instructions said to do. But i am hearing this thumping/knocking sound come from the engine bay, from the inside of the car it sounds like knocking or popping. It also sounds like it is coming from the left side of my engine area. The sound only happens when i accelerate/decelerate. Any help would be GREATLY appreciated!