In the US, we never got the best Subaru of them all, the first generation WRX coupe, getting stuck with the fun-but-not-fast 2.5RS version. One of the more popular upgrades for those cars is the "R-STi" drivetrain swap. In the season premiere of Tuned, we look at two approaches: the USDM drivetrain swap, and the JDM drivetrain swap. Which is better? You decide.