Could this help performance?

I cleaned out the TB today and whilst removing the intake pipe I noticed it goes into a plastic box type thing underneath. I know Vectra's have this and some of the MK6 Escort's.......they are meant to keep induction noise quiet. Thing is if I blanked the inlet pipe to where it is going down into the plastic housing then this would give a far more direct feed to the TB thus = in extra performance......but before I do this do I need this plastic box and what are the thoughts on this mod?

Here is a pic of where the pipe joins onto the plastic box thing.....




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take it off and use a Right Guard cap to plug the hole. Not sure on performance but you get loads more room in the engine bay.
 
I took mine out and didn't notice any performace as such but the noise made it unbearable as soon as i put my footdown.
 
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