Can Am Large Intake Manifold Boot

What is the difference between this one and stock ? Thanks

Please email us your year, make, model for us to let you know the diffrence. Thanks!

Is the large intake manifold boot for the aluminum intake?

This is for many applications, its not a simple anwser. 

We need an email of year, make, model TB size if not stock or part# and what intake manifold your trying to install to advise properly.