When I searched : Engine Cleaner I didn't really get good results. (So don't screw me for not searching!) A few people said Simple Green, or Purple Power, but what is the best stuff to clean off things like valve cover and manifold, headers and other first- see things? Thanx!!!

 

I use Castrol Super Clean myself Ive also heard of simple green too. Either or just grab one of them and go to town on that engine/bay and post your results. Hell maybe even scrub it a little and it might come out shiny lol

 

purple power, engine brite, black magic. i'd say they all work pretty much the same. just spray and let it soak in for a bit, then rinse off with water and wait to dry before starting engine.