test-tune-subaru-sti-125-009

The Verdict

With carefully selected bolt-on parts, an eye for engine efficiency and an aftermarket engine management tuning solution, we were able to significantly increase power output on our 2011 Subaru STI. By optimizing fuel and ignition maps with the COBB AccessPORT engine management system, we were able to increase power output levels on the EJ257 engine while providing a safe and stable pump-gas tune with an equally safe and more powerful race gas setup.

The Bottom Line

HP Level HP Increase % Increase Total
BASELINE 246.1
Test 1 Crawford Perf. FMIC
260.9 14.8 6.0% 14.8
Test 2 Go Fast Bits Pulley
266.2 5.3 2.1% 20.1
Test 3 VP Racing Fuel MS109
289.5 23.3 8.7% 43.4
* * * * *
FINAL POWER 289.5 22.8% 43.4
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