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HKS Toyota GR Corolla LEGAMAX Sports Exhaust / HKS 2022+ Toyota GR Corolla Error Cancellation Kit

Regular price $ 2,110.00 USD
Shipping calculated at checkout.

Short Description

The HKS LEGAMAX Sports Exhaust for the Toyota GR Corolla delivers a refined yet aggressive sound with significantly reduced exhaust backpressure. Featuring a valve-less dual titanium tip design and included Exhaust Error Canceller, this system enhances mid-range performance while maintaining daily driving comfort.

Pickup available at SHOP HQ

Usually ready in 5+ days

Delivery and Shipping

Domestic orders typically arrive within 3-7 business days, while international orders may take 7-14 business days. *Please note that additional time may be required for items that are drop shipped or back-ordered.

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Description

The HKS LEGAMAX Sports Exhaust System is engineered to elevate the driving experience of the Toyota GR Corolla by balancing comfort, sound quality, and performance. Designed with a valve-less straight-through internal structure, this system reduces exhaust resistance by up to 41% compared to the factory exhaust with valves open, improving throttle response and mid-range power delivery.

At low engine speeds, the exhaust remains smooth and comfortable with no droning or muffled tones. As RPM increases, the sound transitions into a deep, sporty exhaust note that complements the GR Corolla’s performance character. Dual φ119 titanium slash-cut tailpipes create a bold rear appearance, while the centrally mounted bracket with laser-engraved HKS logo adds both rigidity and visual appeal.

To eliminate issues associated with removing the factory exhaust valve system, HKS includes an Exhaust Error Canceller to prevent stored fault codes or OBD-related errors. Precision engineered and JQR certified, the LEGAMAX Sports exhaust maintains factory ground clearance and delivers proven gains in horsepower and torque throughout the mid-range RPM band.

Specifications

Vehicle Fitment: 2023–2025 Toyota GR Corolla AWD G16E-GTS (GZEA14H)

Brand: HKS

Part Number: 31021-AT009

Type: Cat-Back Exhaust System

Design: Valve-less dual exit

Construction: SUS304 stainless steel with titanium tail tips

Testing: JQR30232128 certified

Includes: Exhaust system and Exhaust Error Canceller

Warranty: Manufacturer limited warranty

Origin: Japan

Cross Reference:

Replaces factory valved exhaust system on GR Corolla GZEA14H

Dyno Graph Explained

The provided graphs and figures are based on in-house measurements and are subject to variation depending on the specific vehicle and measuring equipment used. Actual results may differ based on individual vehicle characteristics and the type of measuring equipment utilized

The installation of the muffler has proven effective in enhancing power and torque in the mid-range RPMs.

The output has increased by up to 4.0%, while torque has seen an improvement of up to 5.2%. This reflects the positive impact of the muffler on the vehicle's performance within that RPM range

HKS vs stock

HKS 31021-AT009
221.6/6600
431.0/4250

Stock
221.2/6600
414.8/4300

Maximum power and torque difference
Output
7.7kW (10.5PS)
/4650rpm
⇒ Up by approx. 4.0%

Torque
18.9Nm(1.9kgf・m)
/3200rpm
⇒ Up by approx. 5.2%

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