Max-Torque Clone clutch 
Uses BULLY PATTERN Drum
No Sprocket-Order Separately
Does not include outer 7/8" Snap Ring
A great clutch for spec engine class applications.
Very durable and simple to use.
More suited for lower horsepower engines but could work well enough for higher horsepower as well.
Max-Torque Clone clutches are built to engage a little higher than the standard fun kart clutch (2900 - 3200 rpm).
Comes boxed with mounting hardware and instructions.