Finally jumped into the fray. It seems like a universal truth that the first and most important mod you can make to your S197 is a CAI and performance tune. Boy were you all right!! For those who have been watching from the sidelines, the difference is just stunning. jaw dropping. And I have a 5-speed automatic GT. It's like an entirely different vehicle now. No throttle lag. It slams through the gears like a scalded dog.
Don't walk, RUN and get these 2 mods immediately if you have not done so already!

I live in the Philly area, and was therefore able to go visit Evolution Performance in person. In 15 minutes flat, they installed a C&L Racer CAI and re-flashed me with their own performance tune on an SCT X2, all at no additional cost. I will definitely be going back to them for my next mod.....hmm, Borla Stingers? UD Pulleys? So many choices......

 

any numbers yet?

 

...not just numbers on the output but what octane tune are ya runnin'?...

 

That's the scary part. I had 3/4 of a tank in the pony when I went for the mod, so they gave me an 87 tune to start. Waiting in the SCT is a 93 tune for after my next fill-up. I'll get some numbers when I have Evolution Performance do my next mod. They have a dyno on site, and I think it has allowed them to do some nice tweaking, especially for automatic perforamance. I'm very happy with their custom tune.

 

First mod should be a blower on these cars because they need it!