Just install my Cobb and holy cow!

[Sarge135]

The JB4 was great for power, and versatility. The Cobb is great for personalized tuning, ease of use, and the engine runs allot smoother. I wanted to take advantage of the car's OBD information with me radio setup. The JB4 will not allow anything else to communicate.

Originally Posted by gwhiz

I would expect the JB4 to blow away COBB stg 1 power wise being that I assume it's a much more power oriented tune. What are your experiences? Is the smoothness worth the "loss' in power?

[AJN54135i]

The Cobb alone improves performance dramatically. I was very impressed as well when I got mine. Enjoy!