Originally Posted by
MMor101
What the difference between the Sport 10, Junior 9, and the Nova N21R?
If those were your choices of what u are going to buy go with the Junior 9.
I personally own one and just broke in and race tuned one for a friend. For the money it is the best engine you can get IMO. Put a 2045 pipe and either a 192mm or 198mm header and you will be