how in the crap did you put the motor back in with the headers on...?
mine has a small leak that has developed in the past few weeks.. pretty sure its coming from egr... one day when im not lazy im gonna do egr delete and fix that prob.
but doesn't that cost some MPG?
barely. i might have lost 1 MPG doing it, but it cleaned up the engine bay ten fold as well as leaving less places for a leak in the system.