I have sensor simulator for sale for a 04 too 08 ram 1500 5.7 hemi I bought the truck it had no cats on it soo I went too Queen City performance and bought the simulators it too of the engine light also it had more power with the cats it like straight pipe but the exhaust on my truck was a little too strong soo I put cats back on I paid 260 brand new so asking 150 obo for more info text 550-1367 make me a deal they work good through me a offer