I had seen this on ebay, looks like they are claiming 35 horse power for the SRT6. I have been talking with Renntech and they are telling me that it is impossible to get over 12 to 15 horse power out of an SRT6 with just an ECU upgrade. That's why I had done the original post asking if there were any SRT6 guy's out there that had done just a ECU upgrade to see what they thought about it. I had also been e-mailing Upsolute back and forth for a couple day's and when I asked for some type of documentation, proof or a dyno sheet, I've not heard a thing back from them. I looked at the sellers feed back and there were seven pages of great feed back, but who knows if any of them were SRT6 Crossfires. I will probably do a ask the seller a question and see if he can put me in touch with an SRT6 customer that they have done a chip for.