Code No. 31021-AF026
The quad exhaust for the WRX S4 is designed to reduce exhaust pressure while delivering an impressive sports sound that will leave you excited.
Cert. No. | JQR60244002 |
---|
Vehicle | WRX S4 |
---|---|
Model | VBH |
Engine | FA24(TURBO) |
Model Year | 21/11 - |
Shape of muffler | Ti-1 (Titan)
(LEGAMAX Sports) |
|
---|---|---|
Main material | S304 | |
Diameter of tip | 98 x 4 | |
Diameter of center pipe | 74.7 - 60.5 x 2 - 45 x 4 (*1) | |
Close noise level | Stock | 79 |
HKS | 90 | |
About road clearance(*2) | Clearance | 130mm |
Portion of the kit | Front pipe | |
Remarks | ||
Product Weight | 24.14kg |
No change in minimum ground clearance. (Stock front pipe 130 mm)
~Product specifications and sound quality~
Exhaust resistance test results
Power check (Exhaust replacement only)
*These values are experimental measurements conducted on our vehicles using our chassis dyno. Consequently, results may vary due to factors such as weather conditions, individual vehicle differences, and variations in measuring equipment.
Stock | LEGAMAX Sports | |
Maximum output | 178.6kW(242.8PS)/5400rpm | 183.4kW(249.3PS)/5400rpm |
Maximum torque | 344.5Nm(35.1kgf・m)/3600rpm | 351.7Nm(35.8kgf・m)/3500rpm |
Power check (with HKS Power Editor)
*These values are experimental measurements conducted on our vehicles using our chassis dyno. Consequently, results may vary due to factors such as weather conditions, individual vehicle differences, and variations in measuring equipment.
Stock | LEGAMAX Sports | |
Maximum output | 181.8kW(247.1PS)/5700rpm | 181.9kW(247.3PS)/5300rpm |
Maximum torque | 383.6Nm(39.1kgf・m)/2700rpm | 388.2Nm(39.6kgf・m)/3300rpm |
~Product refinement and precision~
Development began with the concept of an exhaust system that prioritizes three key aspects: performance, sound quality, and appearance.
By incorporating a longer pipe length, a departure from the conventional design, we successfully minimized muffled sounds and accentuated a sporty high-frequency tone around 500 Hz. Additionally, utilizing four 45 mm pipes enhances the cross-sectional area, thereby improving both performance and sound quality.
Attention to detail was paramount in the design of the rear view. A symmetrical four-pipe cannon configuration, strategically positioned hook and bracket protrusions, and an intermediate pipe layout engineered to maximize floor space utilization were implemented. This meticulous design ensures minimal ground clearance while delivering a striking quad-tip appearance.
TIG welding is extensively employed in crafting the main silencer, ensuring precision and durability. Furthermore, the titanium tail undergoes a meticulous baking process to achieve a stunning gradation effect. These intricate designs are meticulously executed by skilled craftsmen, all done by hand, ensuring each product meets the highest standards of quality and aesthetics.
HKS has dedicated ourselves to perfecting even the smallest details, ensuring that you can enjoy our LEGAMAX Sports muffler for years to come, no matter the situation. We sincerely hope you derive immense satisfaction from your experience with our product.
*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.
[ CLOSE ]