Guys I'm starting to suspect my headers are warped. What's the best way to tell, and if they are how should I go about fixin it?

Josh Hucks
NXS Customs

 

Are you talking about the flange where it mates to the head? You might be able to take them to a machine shop and have them milled down flat.

You might check around each exhaust port and see if there is any weld material that protrudes past the flange. That would cause them not to seat properly. You could probably knock that down with a file or dremel.