Cheap headers
But unless you have lots of other mods on the car you don't need headers. There's much more to be gained on the intake side of things first.
<img src="http://edsaudi12v.com/audi/headers1.jpg">
<img src="http://edsaudi12v.com/audi/elheaders.jpg">
But, you may as well do it when you have the heads off if you have the fabrication skills.
Not sure where you can find pistons, but they are WAY unnecessary unless you plan to go stand-alone engine management with high revs or a turbo setup.



