I was installing my nitrous solenoids and plate last week and noticed there were blocks of foam under plastic intake manilfold in my truck. 06 silverado with a 4.8. Will it hurt anything to remove those blocks, or should I leave them alone? thanks in advance. By the way I also did the throttle body coolant bypass, will I have any issues with that?

 

I'd leave them in there. They keep junk from getting under the intake manifold.

 

agreed, junk also includes water entry is minimized, water getting down to the knock sensors is a primary cause of their failure.

 

Amen.

 

Their primary design was like a noise baffle, GM said. But they do serve a purpose in protecting from debris. But without them it's almost like an Air Gap Manifold but I'd safely say you'd never notice a power gain from removing them, probably a little more blabber at WOT.

 

Thanks for the help.