royfan, ya i thought it was. the bad thing is if you use a nova coupler the block of the motor rubs it's way through. so any way this is a great motor brutal bottom end and endless top end for a 12,
know the bad news, 1 they dicontinued this motor and 2 keep a close eye on the connecting rod they blow out like nobodies business.
i ran mine in offroad so it was not put through the stress of onroad, so keep a eye on it.
The pipe combo that rc alan mentioned is a great match for this motor. the powerband of this motor works great with the tuned set up of that pipe.