i'm a newbie at exhuast so don't eat me alive here, but....to put headers on, is there enough room to jack the car up and put them on from underneath, or does the engine have to be lifted. the only times i've heard of people putting on headers, they do it while they have the engine out working on it....thanks

 

Instructions vary from manufacturer to manufacturer, but typically the motor mount on the side you're installing has to be unbolted and the engine lifted up some.

Some brands only one side needs to be lifted, others both, some easier to get in from the top than from the bottom, some one side from bottom one side from top, etc.