On 5-13-02 I posted that a place in LaVergne/Smyrna, TN. was replacing OPD valves for $10 each tank and this included testing along with a quick shot of paint if it needed it. Within a month the price increased to $12 then $15 each tank. I'd say it is higher than that now. I guess it is all about supply and demand. I still have one tank to have an OPD valve fitted but it is full right now. TN. is one of those states that has not complied with the regulation as of yet.
'01 2500hd ext. cab, 8.1 litre gas, 5 sp. Allison auto
3.73 rear end
Mag-Hytec rear diff cover
Amsoil Dual by-pass oil filtration system
Amsoil synthetics all around
265 watt AM Solar, Inc. system