AMR Performance: 2016 Subaru STi: STOCK-vs-STAGE 1+ (AMR Cold Air Intake) Test Data AMR PERFORMANCE (AMR) BMI COLD AIR INTAKE TESTING – 2016 SUBARU STI – This data and testing was done to compare the factory air box “depression” / “restriction” from stock -vs- stage 1 (just tune) -vs- stage […]