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VERIFIED REVIEWS

BMW 5/6 Series M5/M6 F06/F10/F18 304 Stainless Steel Downpipe 2012-2018

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$2,099.99 $2,700.00 Save $600.01
  • 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: K2-083-BMW-125-EXH
100,000+ Happy Customers100,000+ Happy Customers
30-Day Returns30-Day Returns
One Year WarrantyOne 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 M5/M6 F06/F10/F18 with Premium 304 Stainless Steel Downpipes - High-Performance S63TU Upgrade (2012-2018)

Elevate your BMW's performance with our exclusive high-performance downpipe system. Join thousands of discerning M5 and M6 owners who have transformed their S63TU twin-turbo powerplants with precision-engineered exhaust solutions that deliver exceptional power gains, enhanced throttle response, and an aggressive exhaust note.

✓ 304 Stainless Steel ✓ Maximum Flow Design ✓ Race-Proven Performance ✓ TIG Welded

Experience the pinnacle of exhaust performance engineering with our premium 304 stainless steel downpipes. Meticulously designed for the S63TU twin-turbo V8 engine, these high-flow downpipes eliminate restrictive factory catalytic converters, dramatically reducing backpressure while delivering substantial horsepower and torque gains that unlock your M5 or M6's true potential.

Premium Engineering & Design
  • Premium 304 Stainless Steel Construction - Superior corrosion resistance and extreme durability for long-lasting performance
  • 3-Inch Mandrel-Bent Design - Full-diameter construction maintains maximum flow throughout entire length
  • CNC Precision V-Band Transitions - Machined stainless steel connections ensure perfect fitment and reliable sealing
  • TIG Welded Construction - Hand-crafted welds with back-purging for exceptional strength and reliability
Performance Specifications
  • Horsepower Gains - 20-30+ wheel horsepower increase on stock tune, 50-65+ HP with aftermarket tuning
  • Torque Enhancement - 55-60+ lb-ft gain on stock tune, 60-70+ lb-ft with performance calibration
  • Reduced Backpressure - Elimination of restrictive catalytic converters significantly improves exhaust flow
  • Enhanced Turbo Spool - Faster turbo response and elimination of turbo lag for immediate throttle reaction
Vehicle Fitment
Model Generation Body Code Engine Year
M5 Sedan 6th Generation F10 S63TU 4.4L V8 Twin-Turbo 2012-2018
M5 Long Wheelbase 6th Generation F18 S63TU 4.4L V8 Twin-Turbo 2012-2018
M6 Gran Coupe 3rd Generation F06 S63TU 4.4L V8 Twin-Turbo 2012-2018
M6 Coupe 3rd Generation F12 S63TU 4.4L V8 Twin-Turbo 2012-2018
M6 Convertible 3rd Generation F13 S63TU 4.4L V8 Twin-Turbo 2012-2018
Advanced Performance Benefits
  • Major Power Increases - Substantial gains throughout entire powerband, from low-end torque to high-RPM power
  • Improved Throttle Response - Sharper acceleration and immediate power delivery with reduced turbo lag
  • Aggressive Exhaust Note - Deep, exotic V8 sound with pronounced exhaust crackle on downshift
  • Weight Reduction - Significant weight savings compared to heavy factory catalytic converter system
Premium Construction Features
  • Full 3-Inch Design - Maintains complete 3-inch diameter up to turbos for maximum flow capacity
  • Smooth Radius Bends - Mandrel-bent construction reduces turbulence and optimizes exhaust velocity
  • Rust-Resistant Materials - 304-grade stainless steel provides extreme corrosion resistance
  • Hand-Crafted Quality - Precision TIG welding ensures exceptional durability and leak-free performance
Package Contents
  • 1 Pair of Premium 304 Stainless Steel Downpipes (Left & Right)
Important Installation & Tuning Notice
PROFESSIONAL INSTALLATION & TUNING REQUIRED: This high-performance downpipe system requires professional installation by an experienced technician and ECU tune recalibration to avoid check engine lights and optimize performance gains. Stage 2 tuning software is recommended for maximum power delivery.
Installation Details
  • Installation Type: Direct bolt-on replacement for factory downpipes
  • Skill Level: Professional installation strongly recommended
  • Tools Required: Professional-grade automotive tools and lift equipment
  • Time Required: Approximately 4-6 hours for complete installation
  • Tuning Required: ECU recalibration necessary to prevent check engine light and optimize performance
Sound Characteristics
  • Deeper Growl - Rich, aggressive V8 exhaust tone with increased volume over stock
  • Pronounced Crackle - Distinctive exhaust burble and pops on deceleration and downshifts
  • Confident Punch - Sharp, assertive sound during acceleration and gear changes
  • Enhanced Character - Exotic exhaust note befitting high-performance M division heritage
Compatibility & Requirements
  • S63TU Engine Specific - Designed exclusively for 2012-2018 S63TU twin-turbo V8 applications
  • LHD & RHD Compatible - Fits both left-hand drive and right-hand drive models
  • Exhaust System Compatible - Works with factory exhaust or aftermarket cat-back systems
  • Heat Shielding - Compatible with factory heat shields for engine bay protection
Expert Support & Warranty
  • Live Expert Assistance - Team of performance specialists ready to provide technical guidance and installation support
  • Quality Assurance - Hand-crafted construction with rigorous quality control standards
  • Fitment Guarantee - Precision-engineered for perfect OEM-level fit on specified S63TU models
  • Professional Installation Support - Technical assistance available for installers and tuners
Shipping Information
  • Manufacturing + Shipping:  3-5 weeks to manufacture the product. 1-2 weeks for shipping
  • Tracking: Full tracking provided with every order
  • International Shipping: Available worldwide with calculated rates at checkout
  • Secure Packaging: Professional protective packaging ensures safe delivery of premium exhaust components
Our Promise To You

Every high-performance downpipe system is backed by our commitment to excellence and customer satisfaction. These precision-engineered 304 stainless steel downpipes represent the best bang-for-buck modification available for your S63TU engine, delivering the exceptional power gains, enhanced throttle response, and aggressive exhaust note that transforms your M5 or M6 into the true performance machine it was designed to be.

Ready to unleash your M5/M6's potential?

  1. Verify your vehicle has the S63TU twin-turbo V8 engine (2012-2018 models)
  2. Arrange professional installation with experienced BMW performance specialist
  3. Schedule ECU tuning for optimal performance and to eliminate check engine light
  4. Complete your order for priority processing and maximum performance upgrade

Join the elite community of M5 and M6 owners who have elevated their S63TU performance with premium downpipes. Experience the substantial power gains, lightning-fast turbo spool, and intoxicating exhaust note that defines the ultimate BMW M division driving experience.

Unlock true M performance - Order now to transform your M5 or M6 with race-proven engineering that delivers exceptional horsepower, torque, and an exhaust sound that commands respect.

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.
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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.

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