HKS 31021-AT009 LEGAMAX Sports Axle-Back Exhaust for 23-25 Toyota GR Corolla

Vehicle Fitment

• 2023-2025 Toyota GR Corolla GZEA14H G16E-GTS

Fitment Notes

• Valve-less design -- includes Exhaust Error Canceller to prevent error codes
• Maintains all factory emissions equipment intact, no alterations required
• Series name is LEGAMAX Sports, not to be confused with LEGAMAX Premium

Features

• Valve-less, dual tail tip layout
• Large-diameter titanium slash tailpipes
• Exhaust Error Canceller included to prevent check engine light
• Bracket connecting left/right silencers positioned at center notch with laser-engraved HKS logo
• 40% reduction in exhaust resistance versus stock valve when open
• Straight internal silencer structure
• Meticulously engineered sound volume -- no muffled mid-range, robust deep bass at higher revs
• Comfortable, quiet ride at low RPM

Specifications

• Series: LEGAMAX Sports
• System type: Axle-back
• Main tubing diameter: 74.7mm - 60.5mm x 2
• Tip outlet diameter: 119mm (phi119 titanium)
• Tip layout: Dual, valve-less
• Material: S304 stainless steel, titanium tips

Included Components

• 1x Axle-back exhaust system
• 2x Titanium tailpipe
• 1x Exhaust Error Canceller

Product Description

The HKS 31021-AT009 LEGAMAX Sports is a valve-less axle-back exhaust built for the 2023-2025 Toyota GR Corolla, featuring a dual tail tip layout with large-diameter titanium slash tailpipes that create a commanding rear view compared to the factory system. A straight internal silencer structure delivers a 40% reduction in exhaust resistance versus the stock valve when open, all while keeping every factory emissions component intact and unmodified.

Despite the valve-less design, HKS's sound engineering avoids the muffled mid-range drone that often comes with removing a valve -- the ride stays quiet and comfortable at low RPM, then opens into a robust, deep bass tone as revs climb, delivering a sporty character throughout the entire rev range. An included Exhaust Error Canceller prevents error codes from appearing since the factory valve is no longer in use.

The 119mm titanium tailpipes exit through a center bracket connecting the left and right silencers, laser-engraved with the HKS logo for a finished, purpose-built look visible through the rear bumper notch. Installation requires HKS PN G89580-T76010-00. Built for GR Corolla owners who want a genuine HKS sound upgrade without compromising factory emissions compliance.