I installed the borgeson delphi 600 box and the truck pulled hard to the left ,the truck had always drove straight before,checked everything then called borgeson ,they said send it back could be a bad valve, so last friday they receive it but cannot get to it till monday, monday i call and get told sorry cant get to it till tuesday so i call today at 10 am and get told sorry call back this afternoon at 3 they tell me that they are putting it on the rack call back later so at 4:30 i call back and they tell me they found the problem and will be shipping my same box out ,I asked to have a new box but was told i would have to wait for them to look at it, I think that being that the box was brand new and the problem was not my fault they should have sent me a new box and not made me wait. I asked about a discount on a sector shaft to compensate for the labor and power steeing fluid i lost was told they could knock off 15% WOW i got 20 dollars in power steering fluid and 18. 45 in shipping which they tell me they will refund the shipping. I hope the box performs better than their cust service when i get it back.