I was going to replace my shocks soon and noticed one leaking last week (Bilstein 5100). I originally bought these along with my lift from Nor cal Truck. Apparently you can not call them, so I emailed twice. They did respond but did not really answer my questions. They offer a set of 4 shocks for a 4-6" ntbd lift and 2.5-5" rear lift. I only have 2" of rear lift and my shocks look like they're already too long so I wanted to try a shorter rear shock. Since nor cal wasn't very helpful and doesn't provide any model #s or measurements like other websites, I was hoping you guys could point me in the right direction as far as model # and/or exact sizes for my application. Cognito 4-6" non torsion bar drop (cranked up) and 4" deavers in back with 2" drop shackles = 2" rear lift. Thanks.