The 991 Carrera S just gains a lot more power with bolt on modifications though as the 3.4 liter looks pretty close to being tapped out. The GIAC tune alone (blue line) only raises output by 8 wheel horsepower. Not too much to gain out of this motor unfortunately so owners will have to wait for forced induction for any serious power. That, or they should have gotten a Carrera S to begin with.
- The BLACK graphs represent the completely stock 991 Carrera.
- The BLUE graphs show results from the GIAC software alone.
- The RED graphs show results of GIAC software, together with the Tubi exhaust and BMC air filters.