HKS Legamax Premium Axle Back Exhaust - 2015-2021 Subaru WRX / STI
HKS Legamax Premium Axle Back Exhaust - 2015-2021 Subaru WRX / STI
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HKS31021-AF024
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HKS31021-AF024
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HKS31021-AF024
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HKS31021-AF024
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HKS31021-AF024
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HKS31021-AF024
HKS
HKS Legamax Premium Axle Back Exhaust - 2015-2021 Subaru WRX / STI
HKS Legamax Premium Axle Back Exhaust - 2015-2021 Subaru WRX / STI
Couldn't load pickup availability
HKS S4 Legamax Premium Ti-1 Axle Back
About silencer shell type of silent Hi-Power
- TYPE-S/Oval silencer for noise reduction.
- TYPE-H/Round silencer for performance.
Specs:
- Shape of muffler:Ti-1
- Close noise level:
- Stock-74
- HKS-85
- Clearance 180mm
- Weight 14.6kg
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.
Road clearance
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.

| Specification | Value |
|---|
- 5 stars: 2 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
Straight out of the box, the axle back looked high quality and incredibly nice. Everything that comes with the package is kind of self-explanatory for install since the manual is in Japanese.
The hardest part for me was was waiting for the part as it took a little over half a year, but looks like it's back in stock now. Installation was pretty quick (about an hour) if you can the car on a lift. The exhaust tips look really good, and the sound of the mufflers itself is slightly louder from stock but not that noticeable. I was hoping the sound level would be a bit louder but still love what I got.