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I replaced mine last year when I bought the truck with the DieselRX Wellmans because thats what the Wiki recommended. Once I had them installed I started reading all the threads about them swelling and causing trouble. I'm pretty sure the DieselRX and the SSDieselSupply ones are the exact same...

It may be more than the plugs, I put Wellman's in a couple months ago because I went by the Wiki for the part number without searching before I ordered. The one's I pulled out were Wellman's and had no trouble removing them, all were burned out, none badly swelled. Next set I'll order the...