OK. Part # is BEL-8510 from summitracing.com. I got these for my 2/2 drop because Belltechs application guide said this is what I needed...WRONG. These don't work for a 2" drop on a SS. Looks like these will work for a 4-8 drop on a silverado. These are NEW. Shop installed them but then removed them because the truck was sitting too low. backend was lower than the front lol. Anyway I'll these 2 shocks go for $50 + S&H. These shocks cost me over $80 so I think this is a great deal. If you pay with paypal add 3% to the total.