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Product Details
| Part Number: | 31021-BH001 |
| Brand: | HKS |
| Body Type: | Coupe |
Give your 10th-generation Civic Coupe a more aggressive appearance, improved exhaust flow, and the refined sound HKS is known for with the HKS LEGAMAX Premium Cat-Back Exhaust System. Part number 31021-BH001 is designed specifically for the U.S.-market Honda Civic Coupe FC3 equipped with the L15B 1.5L turbo engine. HKS lists this application for the Coupe and distinguishes it from its separate Civic Si exhaust system.
The LEGAMAX Premium system combines performance-oriented exhaust flow with an upscale appearance. HKS uses a full straight-through internal structure and efficient pipe routing, resulting in a claimed 50% reduction in exhaust pressure compared with the factory exhaust system. The system is constructed primarily from durable SUS304 stainless steel and utilizes a 60mm main pipe that transitions to dual 50mm piping.
One of the biggest visual changes is at the rear of the car. Instead of the Civic's hidden factory exhaust outlets, the HKS system places dual titanium tips on each side of the vehicle for a quad-tip appearance. Each tip measures 75mm in diameter, giving the Coupe a substantially sportier rear profile without sacrificing the premium styling associated with HKS's LEGAMAX line.
Features:
- Genuine HKS LEGAMAX Premium cat-back exhaust system
- HKS Part Number: 31021-BH001
- Designed for the U.S.-market Honda Civic Coupe FC3 with L15B 1.5L turbo engine
- Full straight-through exhaust design for efficient exhaust gas flow
- HKS reports approximately 50% lower exhaust pressure compared with the stock system
- High-quality SUS304 stainless-steel main construction
- 60mm main piping transitioning to dual 50mm piping
- Dual-exit configuration with four titanium exhaust tips
- 75mm tip diameter
- Replaces the factory hidden exhaust outlets with an exposed quad-tip layout
- HKS sound level: 84 dB, compared with 71 dB for the stock system under HKS's stated test conditions
- Approximately 192mm minimum exhaust-system road clearance with stock suspension under HKS test conditions
- Product weight: approximately 19.0 kg (41.9 lb)
- Complete system includes two mid-pipe sections, right and left main mufflers, gaskets, and required installation hardware
- Vehicle-specific bolt-on design
WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.
Vehicle Fitment
| Year | Make | Model | Trim | Notes |
|---|---|---|---|---|
| 2016 | Honda | Civic | EX-T | Coupe |
| 2016 | Honda | Civic | Touring | Coupe |
| 2017 | Honda | Civic | EX-T | Coupe |
| 2017 | Honda | Civic | Touring | Coupe |
| 2018 | Honda | Civic | EX-T | Coupe |
| 2018 | Honda | Civic | Touring | Coupe |
| 2019 | Honda | Civic | Touring | Coupe |
| 2020 | Honda | Civic | Touring | Coupe |
| 2021 | Honda | Civic | Touring | Coupe |
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