okay, so my engine is getting kinda dirty. i've tried scrubbing the intake manifold with towels, with no result. i was just wondering what you guys were using to clean your manifolds? do you guys use any metal polishes to clean it? it doesn't look as clean with all that gunk on it. any advice?

 

I would probably try using Simply Green. I used that stuff on my old car with great results. I've been wiping down my engine bay since day one so my engine bay stays clean.

 

303 finally made their cleaner available in an industrial concentrate - it's an AMAZING cleaner and degreaser

303 Aerospace Cleaner