I have had the stage 2 jet chip and yes it does add something- increased throttle response and passing times ARE noticeable, especially when chip is removed. I had a problem with my CEL since the install of my header. I have tried all kinds of bungs, extensions and whatnot. Only not trying big daddies mini cat I decided to go the route of trifecta after hearing of Pickles rants and ease of transitioning to his header. I ordered the tune December 3 had a laptop problem and sent them the required ECU read by the 16th. They were closed most of the second half of December, so I then received an email jan 3rd stating tune would arrive ASAP. Well.... I sent 2 inquiries as to the status of my tune and have received no response in 2 weeks, after 2 full months of waiting I actually requested a refund as I now have no tune and a $200 cable. The only judgement I can make on the 2 is that jets turnaround on my first faulty chip was less than a week with no BS, trifecta on the otherhand has yet to respond to my last 3 emails. Perhaps they are extremely busy?? IDK cus I have yet to hear from them, Im sure they are a decent company as they have many satisfied customers, but to wait this long I could have dumped $500 bucks on something else for the ride. If I actually get a response I will update, but to tune a turbo via emails your car will be down for 6 months