You will not be competitive on the track with, or without, the ZTK package. Sorry, but the car is a grand tourer, not a track car. If you're not planning on changing the brake pads and brake fluid, you will learn this much sooner than you wanted. Will you have fun? Absolutely - with or w/o the ZTK!
I have the ZTK and I'd do it again, but even w/o you've got an amazing car. The ZTK includes:
- horizontal oil cooler
- upgraded fan
- Micheline PS4S
- heavy 8.5" and 9.5" wheels that look better than the other options
- fender arches/flares which nicely accents the car's profile
- increased top speed
- larger calipers
- larger rotors
- worthless M lap timer
I've changed out my wheels to forged (19 lbs) and tires to 265 square with a performance all season (no tracking and PS4S is deadly in sleet).
I don't believe the car 'needs' the additional oil cooler, as I haven't read of any overheating issues.
The larger brakes and rotors help with cooling, not much of a difference in daily driving.
I would hate having a top speed of 130 mph as I often drive 100-110 out in the middle of nowhere in NM and AZ, and passing I will frequently exceed 130 as it comes very quick and easy with the JB4 and downpipe. This shouldn't be an issue for those that never leave urban areas.