Amongst other things, I bought a SCT X3 with their "custom long tube header" tune for it for my GT500. The custom tune AND the standard tune threw trouble code P0605. Research showed that was a simple fix, so I asked for it to be corrected. They sent me a file that couldn't be loaded into the X3. I reported it and they sent me another tune. That file wouldn't load into the car's computer, so I reported it again. They sent me another tune which also wouldn't load into the car. I had to go to SCT's tech support, (who are supposed to only support the dealers), to have them fix the standard performance tune to prevent the code, but they were unable to fix the custom tune for which I paid extra. I explained this to RPM Outlet and was told I would be refunded the money. Over a month has gone by and no refund. They also do not answer emails requesting a status on the refund for over a month. I have since searched the web to find volumes of bad experiences with this company. One reports starting a class-action suit against them. Stay away from rpmoutlet!