HKS LEGAMAX Premium Exhaust Catback System - Honda Civic Type R FK8 17+
HKS LEGAMAX Premium Exhaust Catback System - Honda Civic Type R FK8 17+
Universal fit
No vehicle selection needed.
This part may still fit. Check the details below or contact us before ordering. Ask about fitment
Fitment not confirmed
This part may still fit. Check the details below or contact us before ordering. Ask about fitment
Vehicle fitment
This part is listed to fit the following vehicles.
In Melbourne? Fit it in our workshop.
We fit parts in-house at the RevZone workshop. Book a time and bring your car in.
Description
Unlock the full performance potential of your Civic Type R FK8 with the HKS LEGAMAX Premium Muffler System (Code No. 31021-BH003). Engineered for maximum flow and minimal back-pressure, this exhaust delivers a dramatic improvement in turbo response, mid-range power and full-throttle performance—without sacrificing daily drivability or sound refinement.
Key Features & Benefits
Overwhelming low exhaust pressure
The large-diameter φ75 main pipe with a full straight-through structure reduces exhaust pressure to approximately 50% of the stock system. This allows the turbo to spool faster, especially in the low-RPM range.
Performance gains across the rev band
With significantly reduced back-pressure, the engine breathes more efficiently, delivering stronger output from low-end torque to high-RPM power. Tuned FK8 builds have achieved up to 540 ps with no compromise to engine reliability.
Premium construction
Manufactured from S304 stainless steel for outstanding durability and corrosion resistance.
High-quality finish
Equipped with a 97 mm titanium-finished tail for a motorsport-inspired look and a clean, refined exhaust note.
Legal & certified
Fully EU certified (JQR30183001 K20Ct) for street use and compliance.
Fitment & clearance
Direct bolt-on fitment for the Civic Type R FK8 (6BA-FK8) from 2017/09 to 2022/08. Road clearance is approximately 110 mm on stock suspension. Note: clearance may vary depending on aftermarket suspension setups.
Specifications at a Glance
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Vehicle Application: Honda Civic Type R FK8 (6BA-FK8), 2017/09–2022/08
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Material: S304 stainless steel
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Center Pipe Diameter: φ75–60 × 2 (straight-through main flow section)
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Tip Diameter: 97 mm titanium
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Noise Level (Idle): Stock approx. 82 dB / HKS approx. 88 dB
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Road Clearance: Approx. 110 mm (vehicle at stock height)
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Certification: EU Certified (JQR30183001 K20Ct)
Who It’s For
Perfect for Civic Type R FK8 owners seeking more than just an aesthetic change. Whether running bolt-on upgrades or planning a higher-power build, the LEGAMAX Premium is engineered to support increased flow, improved response and reliable performance. Daily drivers will appreciate the balanced sound—sporty, refined, and never overpowering.
Why It Matters
Exhaust systems play a critical role in turbocharger efficiency. By dramatically reducing back-pressure, the LEGAMAX Premium allows the turbo to spool quicker, produce more stable boost, and maintain better flow throughout the rev range. The result is a sharper mid-range punch, stronger top-end, improved throttle response and a far more engaging driving experience.
Installation & Fitment Notes
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Direct bolt-on for Civic Type R FK8 (6BA-FK8), 2017/09–2022/08
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Road clearance may change with aftermarket lowering springs or coilovers
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Mounting brackets and hook designs may vary depending on production batch
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After installation, always confirm all fittings, brackets and heat shields are secure
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Check ground clearance—especially if the vehicle is lowered—to avoid contact or vibration
Specifications
- Part Number
- 31021-BH003
- Brand
- HKS
Shipping
Orders are processed within 1-2 business days (Monday to Friday), and orders placed before 12pm AEST are usually dispatched the same day. Once dispatched, standard shipping takes 3-7 business days and express 1-3, with tracking emailed as your order leaves.
If part of your order is out of stock, we'll contact you with the option to split the shipment or hold it until everything is ready. Read the full shipping policy.
Returns
You have 14 days from delivery to request a return on unused parts in their original packaging. Refunds incur a 15% restocking fee (20% for special orders), or choose store credit and the full purchase value is applied to your account.
Parts that have been test fitted, installed, or used can't be returned, and special-order or overseas-ordered items are assessed case by case. Faulty or incorrectly supplied items are always covered at no cost to you. Read the full returns policy.
