Hey everyone I recently bought a stock 05 wrx with 96k miles. It had a bad coil with misfires as a result so I replaced the bad coil and now the misfires are gone. But there was and still is a knocking sound when you rev the engine to around 3-4k...it sounds like its coming from around the turbo, downpipe area. I have done a compression test with great results (150 on all cylinders) so I'm wondering what could it be?
Thanks guys any help is appreciated.