I have had the standard file since it came out and finally upgraded to tuner. I cannot belive I waited this long. It is much more than I expected! Absolutey unreal. I am a hard guy to please, and this really delivered. After the upload I drove around for an hour and a half and I'm about to go for more. I just can't belive how well it works. It is so smooth and responsive and the engine sounds great. Again, this is coming from a guy that usually adds "yeah but..." to everything. No "yeah buts..." here.

 

Stock MCS, or do you have mods?

 

I have a stock 2003 MCS with tuner, it really made a huge difference, the only complaint i ever had was how long it took to get into the power range 3k+- rpm, with the tuner it gave the car a lot more go a lot earlier, it was a good thing they made the dsc kick on slower because I still activated it quite a bit more often after the tuner had been installed.

I am scheduled to have a 15% pulley next week and think the car will be nearly perfect with the combination of tuner and pulley.

 

Let us know how it turns out with the pulley.
I have an 02 MCS with 15%, ALTA CAI, and Supersprint exhaust. I thought my engine related mods were through, but I am giving this one some serious thought.

 

17%, CAI, Denso Iridium cold plugs & MTH Tuner File
The file really brings the rest into line by delivering smooth power.

 

15%, intake, catback, removed precat, a few other little things. I'm going to do the 2% crank, but want to dyno first to confirm there is no loss from the extra heat.