I've had the 845 Motorsports tune on my car for 9 months and 10k miles. Made 228whp and 288wtq with intake and muffler delete. With those mods on stock tune it made 191whp and 220wtq. I have since added a the 845 Downpipe and hotpipe. We have retuned the car with the extra mods, but have not returned to the dyno yet.