Code No. 32016-AT132
Inheriting the Lightweight DNA of the SPEC-L,
with Further Refinements to Design, Sound, and Exhaust Performance
■Features
- Presence of Φ110 Titanium Tailpipes
The large-diameter Ø110 titanium tailpipes add a bold, distinctive presence to the rear view. - Sporty Sound Inside the Cabin
The exhaust sound is tuned for everyday engine speeds, delivering a sporty tone that lets you feel the excitement of driving from inside the cabin. - Further Reduced Exhaust Back Pressure
Engineered to further reduce exhaust back pressure compared to the Hi-Power Spec-L II, promoting smoother exhaust flow.
■Configuration
| Cert. No. | JQR30263093 FA24 |
|---|
| Vehicle | BRZ |
|---|---|
| Model | ZD8 |
| Engine | FA24 |
| Model Year | 21/08 - |
| Shape of muffler | HP
(Hi-Power SPEC-L GT) |
|
|---|---|---|
| Main material | S304 | |
| Diameter of tip | 110 L&R | |
| Diameter of center pipe | 65 ⇒ 50.8 × 2 (*1) | |
| Close noise level | Stock | 82 |
| HKS | 90 | |
| About road clearance(*2) | Clearance | 125mm |
| Portion of the kit | Measured at the Mid Pipe Under the Rear Subframe | |
| Remarks | Minimum ground clearance remains unchanged. | |
| Product Weight | 10.2kg | |
Remarks
●Lightweight Design Inherited from the SPEC-L
Just 10.2 kg for a Stainless-Steel Dual-Exit Exhaust System! (Stock Exhaust System: 16.2 kg)
The thickness of the silencer shells, pipes, and other components has been optimized to minimize weight.
Despite featuring large-diameter Ø110 titanium tailpipes, the Hi-Power Spec-L GT retains the lightweight design inherited from the SPEC-L, helping bring out the GR86’s naturally agile sports performance.
Thin-Wall Construction
Optimized material thickness throughout the system reduces weight while maintaining the design’s performance requirements.
・Main Silencer Outer Shell Thickness: t0.5
・Mid Silencer Outer Shell Thickness: t0.6
・Pipe Wall Thickness: t0.8 (t1.2 mm in some sections)
・Outer Tailpipe Wall Thickness: t1.0 (Titanium)
Hi-Power SPEC-L GT 32016-AT132
Note: This exhaust system is designed with a focus on weight reduction and therefore uses thin-gauge materials for various components. Although durability testing has been conducted, impacts from road surfaces or obstacles, such as when driving over bumps, may cause deformation or damage to the exhaust system. Please exercise caution.
●Large-Diameter Ø110 Titanium Tailpipes
“Ø110 Titanium Tailpipes for a More Distinctive Rear View”
While retaining the lightweight design of the SPEC-L series, the tailpipe diameter has been increased from Ø94 mm to Ø110 mm.
The larger tailpipes create a bold, distinctive presence that complements the GR86’s rear styling, delivering the aggressive look expected of a sports exhaust system.
The titanium outer covers combine weight reduction with a premium finish.
●2-Way Tailpipe Finisher Adjustment
By changing the mounting position of the tailpipe finishers, the protrusion of the inner tailpipes can be adjusted in two stages.
Choose between Style 1, which positions the finishers further outward to emphasize the presence of the large-diameter Ø110 titanium tailpipes, and Style 2, which offers a cleaner appearance with a more integrated look alongside the body.
This unique customization feature of the SPEC-L GT allows users to tailor the rear view to their personal taste and preferred styling.
Style 1
Style 2
●Exhaust Sound
- A Fuller, Deeper Exhaust Note at Everyday Engine Speeds
Building on the sporty sound of the SPEC-L, the exhaust note has been tuned to enhance the low- and mid-frequency range at typical driving speeds. The result is a deeper, fuller sound that adds a sporty character to everyday driving. - A Sporty Sound That Builds with Acceleration
Rather than simply making the exhaust louder, the Hi-Power Spec-L GT is tuned to deliver a more powerful, dynamic sound as you accelerate. The exhaust note develops with rising engine speed, adding to the excitement behind the wheel. - A More Engaging Driving Experience
With its distinctive exhaust note and bold Ø110 titanium tailpipes, the Hi-Power Spec-L GT adds to the appeal of the GR86, making every drive more engaging.
*In the graphs and tables, HM_LGT refers to the Hi-Power Spec-L GT (this product).
*Graphs and values are based on in-house measurements. Results may vary depending on the vehicle and measurement equipment.
*Measurement Conditions: Engine speed set to 5,250 rpm for the close-proximity exhaust noise test, followed by throttle release and idle.
*Measurement Method: The maximum sound pressure level at each frequency was extracted.
●Performance Comparison (Flow Bench Test)
- Reduced Exhaust Back Pressure for Improved Exhaust Flow
Flow characteristics were evaluated using a flow bench to optimize exhaust flow and minimize back pressure. The Hi-Power Spec-L GT achieves approximately 35% lower exhaust back pressure than the factory exhaust system and approximately 4% lower than the Hi-Power Spec-L II. Its optimized internal design promotes smoother exhaust flow with reduced resistance.
*In the graph: HM_LGT: HiPower SPEC-L GT (this product)
HM_L2 : HiPower SPEC-L II (32016-AF101)
*Graphs and values are based on in-house measurements. Results may vary depending on the vehicle and measurement equipment.
●Performance Comparison
Test Vehicle: GR86 3BA-ZN8 FA24
All components other than the exhaust system are stock parts
| Max. Power (kW/rpm) |
Max. Torque (Nm/rpm) |
|
| HM_LGT | 154.7/7000 | 231.5/3300 |
| Stock Muffler | 152.7/7050 | 229.1/3300 |
Combining Drivability with Strong High-RPM Performance
Delivers more torque than the factory exhaust at around 3,000–3,500 rpm for strong, easy-to-control performance. Power continues to build at 6,000–7,000 rpm, letting you enjoy pulling the engine through the upper rev range.
*In the graphs and tables, HM_LGT refers to the 32016-AT132 Hi-Power Spec-L GT (this product).
*Graphs and values are based on in-house measurements. Results may vary depending on the vehicle and measurement equipment.
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.
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