This is a bit late in posting but I just wanted those who are thinking of Mods and or have mods, this is a great car to have.
I want to thanks Dave and Julio at Cartek for the great job and service they provided me with.
I have the 2X pkg with TPIS headers and cats along with that I also have the small exhaust on the car.. A year ago they set the car up, dyno was reading 438 rwhp 385rwtq. Last week i took the car up for a tune up.. Now this is with at least 150 runs on it. Dynoed at 438 rwhp 393 rwtq.
Now the better news is that on the way up, 29.9 mpg after what I think was 5 dyno pulls and the drive back home with a couple get on the gas from the toll booths

25.6 mpg. and 417 miles round trip.
Thanks guys for a grate setup... 2000 FRC LS1 4.10 rear.
Ernie