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Briefly ... a wet bolt kit is one in which the bolts can be lubricated by means of a zerk grease fitting. On my original (2008) Cougar, I soon replaced my "dry" suspension kit (shackles, bolts, hangers) with a "wet" bolt kit. The bushings, etc. were badly worn and showed signs of excessive wear after a very short time -- far too short.
A worthwhile "upgrade" IMO.
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2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax 
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