Searched everywhere, can't figure out what it is. I installed a downpipe on my 04 WRX and have a lwg stage 2 map loaded, and when my engine idols it sounds like a ticking comming from under the turbo. You can here it when the turbo spools too when my boost gauge still reads in vacume. It goes away as soon as it pulls posative pressure. Anyone have any ideas what this is or how to fix it?