Even though I've got the Rancho's on my truck, I really can applaud the Bilstein warrantee. After putting 150k miles on them in my car (don't even remember where I bought them), they were replaced without any proof of purchase. All that was necessary was my complaint. I merely had to order a new set from the distributer, and when the old set was returned, the credit was immediately applied to the credit card. They even wanted to know if the "progressive springs" were needing replacement as well.