I feel your pain, I was in the same boat with my 07, I had the FRPP twin 65 but wanted to squeeze every last bit of power out of the car. I took multiple days off from work to drive 3 hours to an extremely reputable shop to have them tune the car. I would spend all day there, and then be told the car was ready, I would leave thinking it was 100% and would have issues on the ride home . After doing this several times the shop and tuner there told me it was a mechanical issue with the car, I finally contacted Lund and explained the issues the car was having, he spoke with the tuner @ my shop who was a Lund Racing tuner and he was able to come up with a tune that worked. It wasn't an easy process but it was worth it and I didn't hesitate to put FRPP mono's on my 13 and the 14 Shelbys, they had issues also but once again I eventually got her squared away after sending it to Accufab and was extremely happy with the end result.
