Quote:
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Originally Posted by Hal
Installation surprise follows... READ THIS: the Amstar instructions say you must remove and discard existing U-bolts and nuts, but retain the washers and replace with new GM u-bolts and nuts  or void any warranty for the skids.
Is this standard procedure ?? ANYONE KNOW THE REASON FOR THIS? (serious replies only please)
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The reason for the replacement of the hardware is because when you torque the nuts down to spec the bolt actually stretches and the threads of the nuts stretch and deform. This will cause the bolt to possibly break later on when retorqued, or never be tight because of over stretch. To prevent from lawsuits from bolts breaking under acceleration and causing accidents, they advise you that your warranty will be voided if you don't replace the hardware. This is why commercial lift kits come with new blots and nuts, and also why you need to replace the head bolts when you pull a head.
I agree that for $200 they should include all hardeware to mount them.