Using a Hyper .21 engine in the Matrix?
 

At my local club theres only 4-5 of us in the Outlaw class, yet theres 20+ in the .21 compertition buggy classes. I am looking at replacing the .26 engine with the Hobao Hyper 7 8 port. Just wondering will the Matrix's stock exhaust work ok with it? What about the clutch? Do I need to buy anything extra? Really trying to do this on a shoestring budget, thanks in advance!