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VERIFIED REVIEWS

BMW 3/4 Series M3/M4 G80/G82 304 Stainless Valved Catback 2021+

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$2,199.99
  • Fitment verified for YOUR exact year/model/trim
  • Not sure? Email support@k2-industries.com for a real specialist to help you order
  • Got install questions? Text a tech who's actually installed this part before, even after it arrives
In Stock - Usually ships in 3-5 days
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*Disclaimer: Please input the exact details of your car to ensure precise fitment. Note that some of the components only fit certain models and engines.

K2 Industries  |  SKU: K2-058-BMW-125-EXH
100,000+ Happy Customers100,000+ Happy Customers
30-Day Returns30-Day Returns
1 Year Warranty1 Year Warranty
What to know before you install
Bolt-on install Install Type Bolt-on
Install requirement Requirement Basic tools
Stainless steel Material Stainless steel
What to expect
Most intake and exhaust parts are bolt-on, but rusted hardware, tight access, and sensor placement can affect install time.
Material note
Stainless steel helps resist corrosion and is used where strength and durability matter.
Not sure what this install needs? Email support@k2-industries.com before ordering.
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Details

Transform Your BMW M3/M4 G80/G82 with Premium 304 Stainless Valved Catback Exhaust System - Elite Performance Design (2021+)

Unleash your S58's potential with our exclusive premium valved catback exhaust system. Join thousands of discerning M3 and M4 owners who have transformed their G80/G82 vehicles with precision-engineered performance exhaust technology that delivers both sophisticated sound control and exceptional power enhancement.

✓ 304 Stainless Steel ✓ Electronic Valve Control ✓ Remote Control ✓ Performance Gains

Experience the perfect fusion of motorsport performance and sophisticated control with our meticulously crafted valved catback system. Featuring premium 304 stainless steel construction, advanced electronic valve technology, and precision mandrel-bent piping, this exhaust system transforms your M3 or M4's twin-turbo S58 engine into a symphony of power while providing complete sound customization at your fingertips.

Premium Construction Elements
  • 304 Stainless Steel Architecture - Premium-grade corrosion-resistant steel ensures lasting durability and performance
  • Precision Mandrel Bending - Smooth, uninterrupted flow paths maximize exhaust velocity and power output
  • Electronic Valve Integration - Advanced valve technology provides seamless sound control and customization
  • Professional TIG Welding - Hand-crafted joints deliver superior strength and leak-free operation
Advanced Valve Technology
  • Electronic Valve Control - Remote-controlled valves allow instant sound customization from refined to aggressive
  • OEM Integration Compatible - Seamless connection with factory valve control systems
  • Dual Sound Personalities - Civilized daily driving or track-ready aggression at the touch of a button
  • Remote Control System - Convenient wireless control for on-demand exhaust character adjustment
Vehicle Fitment
Model Generation Body Code Year Engine
M3 6th Generation G80 2021+ S58 3.0L Twin-Turbo
M3 Competition 6th Generation G80 2021+ S58 3.0L Twin-Turbo
M4 3rd Generation G82 2021+ S58 3.0L Twin-Turbo
M4 Competition 3rd Generation G82 2021+ S58 3.0L Twin-Turbo
Performance Specifications
  • Material Grade - Premium 304 stainless steel construction for maximum corrosion resistance
  • Pipe Diameter - Optimized dual 3" pipework for enhanced flow characteristics
  • Weight Reduction - Significantly lighter than OEM system for improved performance dynamics
  • Flow Optimization - Mandrel-bent construction eliminates restrictions and maximizes exhaust velocity
Sound Characteristics
  • Valves Closed - Refined, sophisticated tone perfect for daily driving and comfort
  • Valves Open - Aggressive, motorsport-inspired sound that unleashes the S58's true character
  • Cold Start Enhancement - Dramatic startup sequence that announces your M car's presence
  • Rev-Matched Burbles - Enhanced pops and crackles during gear changes and deceleration
Package Contents
  • Complete Valved Catback Exhaust System (Full Assembly)
Important Installation Notice
PROFESSIONAL INSTALLATION RECOMMENDED: This is a complete catback exhaust system requiring professional installation for optimal performance and fitment. Electronic valve integration requires proper wiring and system calibration.
Installation Details
  • Installation Type: Complete catback replacement with electronic valve integration
  • Skill Level: Advanced - professional installation strongly recommended
  • Tools Required: Automotive lift, exhaust tools, and electrical connections
  • Time Required: Approximately 3-4 hours for complete professional installation
  • Reversibility: 100% reversible system allows return to stock configuration
Performance Benefits
  • Power Enhancement - Improved exhaust flow increases horsepower and torque output
  • Throttle Response - Reduced backpressure enhances turbo efficiency and response
  • Weight Savings - Lighter construction improves overall vehicle dynamics
  • Sound Customization - Complete control over exhaust character for any driving situation
Expert Support & Warranty
  • Live Expert Assistance - Team of BMW specialists ready to provide technical guidance and installation support
  • Quality Assurance - Premium manufacturing standards with rigorous quality control processes
  • Professional Installation Network - Recommended installer network for optimal results
  • K2 Industries Quality - Commitment to excellence in performance exhaust solutions
Shipping Information
  • Manufacturing + Shipping:  3-5 weeks to manufacture the product. 1-2 weeks for shipping
  • Tracking: Full tracking provided with every order via integrated tracking systems
  • International Shipping: Available worldwide with calculated rates at checkout
  • Freight Packaging: Professional packaging ensures safe delivery of complete exhaust system
Our Promise To You

Every premium valved catback exhaust system is backed by our commitment to excellence and customer satisfaction. Experience the perfect fusion of sophisticated sound control, performance enhancement, and premium construction that transforms your BMW M3 or M4 into the ultimate expression of motorsport engineering and driving passion.

Ready to unleash your S58's potential?

  1. Verify your vehicle is a 2021+ G80 M3 or G82 M4 with S58 engine
  2. Arrange professional installation for optimal performance and warranty
  3. Consider additional performance modifications for complete transformation
  4. Complete your order for priority processing and premium M car enhancement

Join the exclusive community of M3 and M4 enthusiasts who have elevated their G80/G82 vehicles with premium valved exhaust technology. Transform your twin-turbo S58 into a symphony of power and precision while maintaining the sophistication and control that defines the ultimate driving experience.

Unleash the S58 symphony - Order now to experience the perfect balance of performance, sound, and control that transforms every drive into an unforgettable automotive experience.

Fitment

Our Guarantee

Warranty Assurance:

At K2 Industries, your satisfaction is our priority, and we stand behind the quality of our products. Here's a brief overview of our warranty:

Defect Coverage:
If you find a defect after receiving your order, get in touch with us. We're committed to resolving the issue, whether it involves a replacement, repair, or refund.

Installation Note:
Please inspect your purchase before installation. Unfortunately, damages post-installation are not covered, so ensure everything looks good beforehand.

Claims Made Simple:
Need to make a claim? Reach out to us at support@k2-industries.com. We're here to assist you. Just keep your original packaging and documentation handy.

Your Satisfaction Matters:
Your trust in K2 Industries is appreciated. We're dedicated to ensuring your satisfaction with our quality automotive parts.

Shipping & Returns

Shipping Information:

At K2 Industries, we strive to provide a seamless and efficient shopping experience for automotive enthusiasts like you. Our commitment is to deliver high-quality parts to your doorstep with the utmost care.

Fast and Reliable Shipping:
Many of our products are stocked in our local warehouse, ensuring swift processing and delivery. Orders placed for these items typically ship within 2-5 business days, allowing you to get your parts in no time.

Extended Selection, Global Reach:
To offer you a broader range of automotive parts, some items are sourced from trusted suppliers around the world. While these products might have a slightly longer processing time, we assure you that the wait is worth it for the exceptional quality and value they bring.

Shipping Transparency:
For products shipped internationally, we provide estimated delivery times on the product page. Rest assured, we are continually working to optimize our supply chain and minimize any potential delays.

Combined Shipments:
To streamline your shopping experience, if your order includes items from both our local warehouse and international suppliers, they may be shipped separately. You will receive separate tracking information for each shipment.

Questions or Concerns?
If you have any questions about shipping or would like assistance tracking your order, our dedicated customer support team is here to help. Feel free to reach out to us at support@k2-industries.com.

You can also track your order here

Thank you for choosing K2 Industries for your automotive needs. We appreciate your trust in us.

FAQs

Will this require a tune after installation?

Bolt-ons like exhaust tips, cat-backs, and basic intakes usually don't. Larger mods — turbo upgrades, supercharger kits, headers — typically need an ECU tune to run safely. The spec sheet indicates if tuning is recommended.

Is this part emissions / CARB compliant?

If you're in California or another CARB-regulated state, check the CARB status on this page before ordering. Many performance parts are off-road or competition use only — if so, we say it clearly.

Will installing this void my factory warranty?

Modifications can affect manufacturer warranty on related components only — not your entire warranty. The Magnuson-Moss Warranty Act protects you from blanket warranty voids. If warranty matters to you, talk to your dealer before installing.

Can I install this myself?

Depends on the part. Bolt-ons are DIY-friendly. Turbo upgrades, headers, and supercharger kits need a professional shop. The product description gives a difficulty estimate.

What You Get With Every Order

Products Selected to Meet Quality & Fitment Standards we Stand Behind.
Products Selected to Meet Quality & Fitment Standards we Stand Behind.
Get Help From People Who Actually Understand Builds & Fitment.
Get Help From People Who Actually Understand Builds & Fitment.
Designed to Resist UV Exposure, Wear, and Everyday Use.
Designed to Resist UV Exposure, Wear, and Everyday Use.
Join Thousands of Builders Who Trust K2
Join Thousands of Builders Who Trust K2

Built By Someone Who's Been There

Max, the Owner, started in his garage making E36 M3 tail lights in his own oven.

  • • Started modifying cars before he could legally drive them
  • • Spent years hunting down parts that actually fit and don't suck
  • • Made the same fitment mistakes you're afraid of

You’re not buying from a warehouse. You’re buying from someone who builds cars just like you do.

Founder photo

What Sets K2 Industries Apart?

We don’t just sell parts. We actually give a damn.
Pre-Order Fitment Verification
Damage Replacement
Real Experts Answer the Phone
Post-Purchase Installation Support
Curated Quality
30-Day Returns
K2 Industries
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K2 Industries
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Pre-Order Fitment Verification
Damage Replacement
Real Experts Answer the Phone
Post-Purchase Installation Support
Curated Quality
30-Day Returns
Add to Cart
GuaranteePerfect fit guaranteed

See Why Customers Love K2 Industries

Frequently Asked Questions

Why Buy from K2 Industries

What makes K2 Industries more than just a parts supplier?

We’re a team of USA-based car enthusiasts committed to helping you get your build right the first time. With our deep product knowledge and close relationships with trusted manufacturers, we ensure you receive high-quality parts that perform. We’re here to support you before, during, and after your purchase, providing personalized advice, part compatibility checks, and responsive customer service. When you buy from us, you’re joining a community that cares as much about your car as you do.

How do I know which parts are best for my car and goals?

Answer: Our team can provide personalized mod plans to match your performance and style goals. Whether you’re building for speed, aesthetics, or both, we’ll help you select the right parts for your vision. Contact us to discuss your project!

Do You Have Financing Options?

Answer: Yes, we offer flexible financing options to make it easier for you to upgrade your vehicle without paying the full amount upfront. Choose our financing option at checkout to split your purchase into manageable payments, so you can start your build now and pay over time.

Visit our FULL FAQ Page

https://www.k2-industries.com/a/faq

Shipping

Do you ship overseas?

Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. We run discounts and promotions all year, so stay tuned for exclusive deals.

How long will it take to receive my order?

It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.

Other

Any question?

You can contact us through our contact page! We will be happy to assist you.

Customer Reviews

Overall rating: 4.6 / 5 from 932 reviews.

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GREAT EXPERIENCE SHIPPING WAS QUICK IM ENJOYING THE PRODUCT

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Customer photo review of NTXGlow RGB Tail Lights (2015-2023 Ford Mustang)

Took 2 weeks to deliver with standard shipping. But well worth the wait. Install took 25 minutes with minimal tools and the lights look amazing. Fitment is perfect and the quality is excellent. Its kinda pricey but you get what you pay for with ntxglow products. Highly recommend!

Michael O. 5/5

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Customer photo review of Shipping Insurance

Wing came in perfect condition! No chip paint, no scratches. Amazing service!

Natalie P. 5/5 Verified

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Customer photo review of Spec-D Projector Headlights Ford F150 (04-08) Mark LT (06-08) Halo Black / Smoked / Chrome

They look amazing, and after using ChatGPT to help me understand how to install them (because the instructions were not very helpful whatsoever), I’m glad with how they turned out. My problems are that the lights aren’t too bright, the instructions weren’t helpful, and the arrival date was wrong, even if they arrived early.

Caleb B. 4/5 Verified

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Customer photo review of 1993-1997 Honda Del Sol Redclear Tail Light Lenses

This isn’t on K2, but the lenses came In which I was thrilled about. I’d already removed my OEM lenses from their housings. The passenger side lense fit well and mostly flush. The driver side, however, looks like it was slightly warped and caused poor fitment and what looks like a small dip in the red portion of the lense. I had no choice but to use them, as my OEM lenses were no longer usable. It can be very difficult to get replacement lenses in a timely manner for a Del Sol. I drive my car everyday, so I had to just go with it. Again, not a K2 issue but presumably the manufacturer.

Thom T. 2/5 Verified

1993-1997 Honda Del Sol Redclear Tail Light Lenses

Customer video review of 2003-2008 Nissan 350Z N4 Style Rear Bumper Cover - FRP

This rear bumper fits great the only thing is the trunk button on the bottom is cut a little to wide but that’s an easy fix it looks great and definitely makes the rear look more aggressive. I love it!

Donovan T. 5/5 Verified

2003-2008 Nissan 350Z N4 Style Rear Bumper Cover - FRP

Customer photo review of Upgraded VANOS Oil Supply Line – M52 / M54 Engines (E36, E46, E39, E60, X3, X5, Z3, Z4)

The box was a little crushed, but the line was packed well and it wasn't a problem. The instructions are 3 pages of color pictures and lots of explanations. Very nice. The line itself is a very nice bit of kit with a swivel AN line end that allows a No-tension install. No leaks so far and it looks great. It came with new banjo bolts and copper crush washers. The only criticism I have is that I would have liked this hose coated in black so it disappears like the original, but it does look good, so I don't mind.

Andrew H. 5/5 Verified

Upgraded VANOS Oil Supply Line – M52 / M54 Engines (E36, E46, E39, E60, X3, X5, Z3, Z4)

Customer photo review of Extend Protection Plan

These side window windows deflectors are durable and do their job perfectly

Cody P. 5/5 Verified

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Customer photo review of Open Front Vents for GR Supra (A90/91)

Not a fan of how thick the sides are on these vent pieces. I feel as if they would have been fine if they kept the oem size on the sides and just made them.

Chad G. 4/5 Verified

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