I had to replace one of my bolts, as it would not take grease. I pulled it out to find when they drilled the hole inside the bolt it had some steel chip inside blocking the flow. The one I pulled out and the replacement had the serrated ends to keep if from rotating. I have the magnum suspension on my 2004.
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2013 Tiffin Allegro 34 QFA
2015 Cadillac SRX (towed)
2019 Tesla Model X
1991 Avanti Conv
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