Originally Posted by Murphy Speed

Had a guy who tunes a funny car and more work over my PCM due to some preignition issues I was having. Changed the knock sensors also. The Joe Gibbs package has alot of tricks built in except I don't know what those are. The tuners you suggested sounds like a place to start. Do you need a new tune if you install long tubes. Already have the Corsair Stainless 3" cat back. Ground force lowered with the baer brake package.

Thanks for the tips