HKS Circle Earth System Grounding Kit Subaru WRX incl. STi Exhaust Muffler Confirm fitment using the application

Confirm fitment using the application guide

ensuring uninterrupted performance under hard acceleration and access to the full tank capacity

and more powerful braking performance

The internal surfaces incorporate Eventuri’s signature dimpled geometry

Organically shaped carbon inlet tubes reduce turbulence and restriction

HKS Circle Earth System Grounding Kit Subaru WRX incl. STi Exhaust Muffler Confirm fitment using the applicationHKS Circular Grounding System utilizes a 24 karat gold plated distribution block and multiple grounding points for improved idle and drivability. Additional grounding points equalize resistance and voltage between various ground points on the car resulting in a more stable electrical system. This will yield better engine response and horsepower by allowing the electrical accessories to work more in tuned with each other offering a more accurate