A well-balanced sports muffler is superior to the ease of handling, comfortable sound, and sophisticated design.

The sophisticated design
We refined the new tail for the stock WRX S4 and arranged a total of 4 beautiful titanium tails on the left and right along the bumper design.

Enjoy the street driving
You can enjoy the sporty sound at the high rpm range as long as the bass sound at the low rpm range by good balance adjust for the pipe diameter, resonator, and silencer by only replacing the main muffler.
It must have fun to drive on various occasions like daily or holidays.

- Sound Quality -

• What we aimed for was a deep sports sound that emphasized the mid-high range while focusing on the low range.
• A partition structure is used to reduce unpleasant noise and give depth to the sound.

- Smooth Sound Flow -

• Even though it has a partition structure, it achieves smooth sound flow with 20% less exhaust resistance than the stock one.

Remarks

The product includes the main muffler only. Confirmed with the JDM spec vehicle only. Overseas models are not confirmed.

About HKS muffler

*1: 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.

*2: 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.

Caution: Hook, bracket, stay may be changed without prior notice.

★ Exhaust noise level at idle.