We recently had the privilege to tune a customer's stage 1 VW GTi a few states away via a custom E-Tune on a COBB Accessport. In doing so, we were able to run the data and come up with a chart comparison of the stock tune, COBB Stage 1 Tune, and our JSTuned Custom Stage 1 tune. We are pretty excited about the results.
Red Line: Stock Tune
Green Line: COBB Stage 1
Pink Line: JSTuned Custom Stage 1