Front Oxygen Sensor WRX MY11-14 16608KA000 A good tensioner will have

A good tensioner will have a high amount of resistance when compressing the plunger and will maintain that resistance over the full range of travel

Gear Ratios (1st-6th):  OEM / 2

All EJ Engines

transfer driven gear rear bearing race and shim

Cobb's battery tie down is machined from billet aluminum with a black anodizing and laser etched Cobb logo

Front Oxygen Sensor WRX MY11-14 16608KA000 A good tensioner will haveThis sensor measures the oxygen content in the exhaust system pre catalyst. An oxygen sensor (or AF sensor) can establish the air fuel ratio by measuring the excess oxygen left over from the combustion process. The front air fuel (AF) sensor is used by the ECU for fuel calculations during closed loop fueling. A faulty sensor can result in poor engine operation or stalling and may set a CEL. Manufacturer Part No.: 22641AA590 NOTE: OEM (Original