HKS Super Turbo Cat Back Exhaust System 2015-2021 WRX/STI

Not just powerful performance with quiet sound! HKS designed this catback exhaust to result in a dry sporty exhaust sound that can be heard inside the vehicle at the step of a pedal.

HKS S4 Super Turbo Cat Back Exhaust System

Not just powerful performance with quiet sound! HKS designed this catback exhaust to result in a dry sporty exhaust sound that can be heard inside the vehicle at the step of a pedal.

In pursuit of the ideal exhaust system they used a 75mm straight structure which generates the lowest exhaust pressure while maintaining comfort inside the vehicle.

About HKS muffler

1. About silencer shell type of Silent Hi-Power

   TYPE-S/Oval silencer for noise reduction.

   TYPE-H/Round silencer for performance.

2. Main material in the component figure.

   SUS304/High quality stainless steel.

   SUH409/Stainless steel commonly used for stock exhaust.

3. About Center Pipe

   Diameter of center pipe is the portion that has the largest diameter. (Excluding silencer and tip.) It is the condition with stock suspension.

   Minimum road clearance between HKS muffler (Any parts included in the kit) and road surface. Therefore, it may be different from actual road clearance of the vehicle.

   The data is basically the condition with stock suspension. However, please understand that some items have data with low down spring or ride height adjustable suspension kit.