SKU: HKSTUDIE-EX001 | UPC: 4957266941010
HKSTUDIE EXHAUST for BMW G80 M3 G82 M4 Competition 2021+
The HKSTUDIE-EX001 catback exhaust system replaces the OEM rear muffler on 2021+ BMW G80 M3 Competition Sedan and G82 M4 Competition Coupe models equipped with the S58B30A engine. It deletes the middle muffler to deliver a gentle yet powerful sporty sound while slashing exhaust pressure by 35% for sharper boost response higher RPM power and gains of 5kW and 15Nm torque. Crafted in Japan this direct-fit system meets UN ECE-R51.03 Phase 2 standards for daily driving and inspections.
Key Features
- One-of-a-Kind Tail Tip Design: Slash-cut tips honor the BMW 3.0 CSL with thick walls blasted dull glossy finish and inner slits for sound deadening creating distinctive texture and presence.
- Gentle Yet Powerful Sound: Middle muffler delete paired with frequency-analyzed tuning produces the signature M sporty tone without harshness ideal for street use.
- Compliant with Japan’s Vehicle Inspection Regulations: Passes strict UN ECE-R51.03 Phase 2 sound limits ensuring safe legal daily operation and inspection approval.
- Reduce Exhaust Pressure by up to 35%: Restriction-free main muffler and optimized pipes improve high-RPM output boost responsiveness adding up to 5kW power and 15Nm torque over stock.
- 2-Year or 30,000 km Product Warranty: In-house Japan factory production and rigorous quality checks back reliability from purchase date.
Product Notes
- Middle muffler must be deleted during installation for full sound and performance benefits.
- Clean blasted tail tip surfaces regularly with mild soap to maintain finish.
- Ships in two cartons for secure transit.
Installation Notes
- Professional installation recommended.
- Bolt-on fit deletes OEM middle muffler no pipe cutting required.
- Retains OEM hangers mounts and sensors fully compatible.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021+ | BMW | M3 | Competition Sedan (G80) RWD/xDrive |
| 2021+ | BMW | M4 | Competition Coupe (G82) RWD/xDrive |
Why Choose HKSTUDIE?
- In-house Japan factory builds every system for consistent craftsmanship.
- Rigorous testing ensures performance durability and regulation compliance.
- Precise engineering balances aggressive sound with refined daily usability.
Frequently Asked Questions
- Q: Does it fit both RWD and xDrive G80/G82 Competition models?
A: Yes bolt-on design works on 2021+ BMW M3 Competition Sedan (G80) and M4 Competition Coupe (G82) RWD and xDrive with S58B30A engine. - Q: What sound changes from stock?
A: Delivers deeper sporty M-series tone via middle muffler delete and tuning stays gentle for daily drives while passing ECE-R51.03 Phase 2 limits. - Q: What does the warranty cover?
A: Full 2-year or 30,000 km coverage from purchase on manufacturing defects with proof of professional installation.
Shipping & Handling
- Method: Ground shipping
- Availability: In stock – ships same or next business day
- Packaging: Two boxes C/No.1 1515 x 600 x 335 mm C/No.2 1161 x 460 x 290 mm
- Weight: 39 kg total (C/No.1 25 kg C/No.2 14 kg)
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