Just put a fresh Mahle Air Filter in a wow did it make a difference in power. That old filter was packed full of sand and crap (2x trips to Las Vegas every month take its toll) .
Anyone else using a Mahle filter? They are OEM replacements and my mech thinks they are excellent.
Check out the filter test. Mahle has the least amout of air restriction to the box!
http://www.bolhuijo.com/airflowtest/