Premium V6 engine sound with a refined design featuring black-coated exhaust tips.

 

 

■Features

• To complement the commanding presence of the GX550, the exhaust features dual Φ102 mm large-diameter tailpipes. The black-coated finish gives the tailpipes a refined, understated appearance, creating a sophisticated tuning style for discerning enthusiasts.
• Developed with a mature tuning concept in mind, this muffler offers a refined exhaust note and comfortable usability, making it suitable for both residential areas and family use.
• From 2,500 rpm to the redline, the engine pulls strongly with linear power delivery. This muffler enhances the driving experience by providing smooth, stress-free acceleration the moment you step on the throttle.

 

 

 

 

 

 

 

Remarks

Applicable Model Grade: OVERTRAIL+ and version L. Modellista aero kit compatibility: Not confirmed

 

 

---

 

●Comparison with the stock muffler

 

• The sound tuning was developed to enhance the driving experience and bring out the distinctive character of the V6 engine. The deep, resonant tone perfectly complements the GX550’s commanding presence, creating a sophisticated and powerful exhaust sound with a refined, premium feel.
• Drone noise inside the cabin during steady-speed driving, such as on highways, has been effectively minimized. Even rear-seat passengers, who are more likely to notice low-frequency resonance, can enjoy a comfortable and quiet driving experience.
• In addition to eliminating unpleasant cabin drone during normal driving conditions, careful attention has been paid to the exhaust volume and sound quality during cold starts and idling.

 

* Notes on Graphs and Tables
   LTM: LEGAMAX TRAIL MASTER (This product)
* The graphs and data shown are based on in-house measurements.
   Results may vary depending on the vehicle and measuring equipment used.

Measurement procedure: Stationary exhaust noise was measured at 3,900 rpm > an accelerator-off condition >idle
Analysis method: The maximum sound pressure level at each frequency was extracted.

 

●Appearance

While pursuing outstanding performance, we also place great emphasis on attention to detail. Each component is TIG welded and carefully finished by skilled craftsmen, one piece at a time. The result of this advanced craftsmanship is a product that achieves exceptional strength along with a beautifully refined appearance.

The black-coated exhaust tips elevate the overall sense of quality, while the pipes feature a refined hairline finish with a sophisticated matte texture. The large-diameter dual exhaust tips are precisely designed to match the GX550’s bumper lines, enhancing its powerful rear styling. The black coating further accentuates the vehicle’s premium and stylish appearance.

 

 

●Exhaust Tip Logo

The traditional “EXHAUST TECHNOLOGY” logo has been reimagined with a refined, minimalist design. Featuring the simplified “EXH TECH” wording alongside the HKS logo, it represents advanced engineering capabilities while adding a sophisticated and premium touch to the product.

 

 

●Performance Comparison

 

 

• Under the factory ECU control, the exhaust maintains output and torque characteristics at a level comparable to the stock muffler. Without compromising the vehicle’s original drivability, it delivers a sporty exhaust sound and a more distinctive presence.
• Modern vehicles are equipped with advanced ECU-based torque management systems that strongly influence engine output. As a result, even when exhaust performance improvements provide additional potential, the difference may not always appear as a measurable increase in power output.

* Notes on Graphs and Tables
   LTM: LEGAMAX TRAIL MASTER (This product)
* The graphs and data shown are based on in-house measurements. Results may vary depending on the vehicle and measuring equipment used.

 

 

●Performance Comparison (When combined with the HKS Mastery ECU (42019-AT037)

 

 

• The Mastery ECU unlocks the full potential of the exhaust performance that cannot be fully utilized under the factory ECU control. When combined with the LTM muffler, it improves power and torque characteristics, particularly in the mid-to-high RPM range.
• Through the synergistic effects of improved exhaust efficiency and optimized engine control, the system delivers a stronger and more responsive acceleration feel, especially during highway merging and overtaking situations.

* Notes on Graphs and Tables
   LTM: LEGAMAX TRAIL MASTER (This product)
* The graphs and data shown are based on in-house measurements. Results may vary depending on the vehicle and measuring equipment used.

 

---

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.