I brought my car to RE to get my car tuned orignally. First time I got there after driving forever and even though I had an appointment their was another car on the dyno so I had to wait my turn. No big deal, so we hung out at the shop. Other car got off and then they we have to close no, we wouldnt want to rush on your car to just get it done and none of us want to stay overtime so just rescedule. Great, drove my hour and a half or whatever back home and rescheduled. That time it seemed like I knew more then about what they were doing then they did. My graphs were all over the place and my power started at 322 and was up to 367 but when we were finished it was back to 329 or something. The guy didnt really seem to know what was going on. Oh well my car was tuned so I was happy that I would finally be able to beat on it. WRONG......2 weeks later I blew my first headgasket. Fixed it and went back and they tried tuning it again. Went to the track this time and the car trapped around 112. Anyways the car stalled while driving, didnt idle , sucked gas like crazy so I decided to buy a tweecer. With my little tuning knowledge the car idled better and was much more reliable. Plus my car was trapping almost 115 with my only change being the tweecer. I think they are pretty decent with 4.6's cause alot of lightnings and 03-04 cobras go there but they jsut seemed lost with my out of date 5.0.