I purchased a pair of used '01 Viper seats. Needed a new pneumatic bulb on one of the seats. Hard to find and was quoted $127 from local dealer- p.n. 4874889 "lumbar support bulb" Bought exactly the same thing from Medexsupply--- for $8 each. Holding the OEM and Medexsupply units in my hands- can't tell the difference at all, if anything the Medex units seem a little nicer. If you need them, here's the scoop: medexsupply.com 888-433-2300 p.n. ADC878 "ADC Bulb and Valve" Hope this helps- Stay safe- Neil Dallas, TX.