Replacment street backplate for pre-Verto type clutches. This backplate weighs about 4.8lbs, and is made out of EN8 steel for a long life. This is a great option for your standard or mildly modified engine. The Mini clutch is odd, using a backplate that gets pulled through the flywheel as a friction surface. The finish of this is critical, so if it is worn, it needs to be machined, or replaced.