Stage 1 Question....
 

What is it? Who makes it? What's the result? Cost?

For example for my TT:

APR Stage 1 is basically a chip upgrade.
APR Stage 2 adds an exhaust and a few other doodads.
APR Stage 3 adds a full kit with manifold, bigger turbo, FMIC, etc.

I've checked the archives on Stage 1 and I've read about some people doing it but the posts are somewhat vague on information and the search also brings up about a million and a half posts.

-Eric

All of the info you need is here https://www.rx8club.com/series-i-engine-tuning-forum-63/

Closing- check the Aftermarket forum :)