I include a Grade 5 bolt, washer and lock nut. Grade 8 bolts are available for $5.00 more. The knock off uses cheaper quality hardware and doesn’t even include a lock nut for a component that is spinning at quite a high rate of speed as you cruise down the highway. Forget price and tell me which looks like the better product. I also include detailed installation instructions as proper installation and torque of the nut are critical. The answer is obvious and the price difference is slight. Buy the Original kit and you’ll buy with confidence.