2 0 Paccar PX-9 Valve Cover $75 USD Good used, cleaned and inspected Paccar PX-9 valve cover. Part number: 5263811. ConditionUsedFits To Make(s)PACCARFits To Model(s)PX-9Part Number5263811Stock NumberRyd 5263811 MLS Number13741383CategoryValve Covers Last Updated8/5/2025 LocationFitchburg, MA, US Sold ByRydemore Heavy Duty Truck Parts (888) 519-___ SHOWNUMBERCall Seller Email Seller Save More Info