If you’re looking for useable street performance on the Scion FR-S and Subaru BRZ, a supercharger kit is probably high on your list. Import Tuner recently got their hands on an Innovate Motorsports supercharger kit for their FR-S and did a full install themselves, complete with a before and after dyno comparison.
The FR-S this Innovate supercharger kit was installed on had an intake and exhaust already installed (as most cars getting forced induction probably will) and laid down 174 wheel horsepower. Factoring in a 20% drivetrain loss, that comes out to about 217 hp at the flywheel, which is a decent gain from a bolt on intake and cat back exhaust.
After the Innovate supercharger was installed, the FR-S made 226 wheel horsepower, 52 more than the naturally aspirated motor for a 30% gain.