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VERIFIED REVIEWS

BMW Z4 E89 304 Stainless Steel Valved Catback 2009-2016

…
$2,299.99 $2,900.00 Save $600.01
  • Fitment verified for YOUR exact year/model/trim
  • Not sure? Call +1 772-277-2495 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

Select your exact model and see if this part fits

*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: K2-105-BMW-125-EXH
30,000+ Happy Customers30,000+ Happy Customers
30-Day Returns30-Day Returns
One Year WarrantyOne Year Warranty
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Every $1 Spent = Entries into our E90 Giveaway

Details

Transform Your BMW Z4 E89 with Premium Valved Catback Exhaust System - T304 Stainless Steel Performance Design (2009-2016)

Elevate your Z4's performance with our exclusive T304 stainless steel valved catback exhaust system. Join thousands of discerning BMW roadster enthusiasts who have transformed their vehicles with premium engineering that delivers dual-tone sound control, enhanced performance, and sophisticated valve technology for the ultimate driving experience.

✓ T304 Stainless Steel ✓ Vacuum Valve Control ✓ Dual-Tone Sound ✓ Direct Bolt-On

Experience the perfect fusion of motorsport performance and everyday drivability with our precision-engineered valved catback exhaust system. Featuring premium T304 stainless steel construction and sophisticated vacuum valve technology, this exhaust delivers on-demand sound control that transforms from refined cruising to aggressive sport exhaust at the touch of a button, while maximizing power gains and enhancing the iconic BMW roadster experience.

Premium Performance Features
  • T304 Stainless Steel Construction - Premium-grade material ensures exceptional durability, corrosion resistance, and long-lasting performance
  • Vacuum Valve Technology - Sophisticated control system allows instant switching between dual exhaust modes
  • Dual-Tone Sound Control - Switch from refined OEM-like tone to aggressive sports exhaust on demand
  • Motorsport-Inspired Design - Engineered for maximum flow efficiency and performance optimization
Advanced Valve System
  • Remote Control Operation - Convenient wireless control allows sound adjustment from inside the cabin
  • Dual Exhaust Pathways - Valves direct exhaust through different chambers for distinct sound profiles
  • Refined Mode - Valves closed delivers sophisticated, near-OEM sound for comfortable cruising
  • Sport Mode - Valves open unleashes aggressive, racing-inspired exhaust note for spirited driving
Vehicle Fitment
Model Generation Body Code Year Engine
Z4 sDrive28i 2nd Generation E89 2009-2016 N20 2.0L Turbo
Z4 sDrive30i 2nd Generation E89 2009-2016 N52 3.0L I6
Z4 sDrive35i 2nd Generation E89 2009-2016 N54/N55 3.0L Turbo I6
Z4 sDrive35is 2nd Generation E89 2011-2016 N54 3.0L Turbo I6
Performance Advantages
  • Enhanced Power Output - Optimized exhaust flow reduces back pressure for measurable horsepower and torque gains
  • Improved Throttle Response - Reduced exhaust restriction delivers sharper acceleration and engine responsiveness
  • Weight Reduction - Lighter than OEM exhaust system improves handling dynamics and agility
  • Maximum Flow Efficiency - Precision-mandrel bent tubing ensures unrestricted exhaust gas evacuation
Premium Construction Details
  • T304 Stainless Steel - Superior corrosion resistance and durability compared to standard steel
  • TIG Welded Seams - Professional-grade welding ensures leak-free operation and structural integrity
  • Mandrel-Bent Tubing - Precision bending maintains consistent diameter for optimal flow characteristics
  • CNC-Machined Flanges - Factory-precise fitment ensures proper sealing and easy installation
Package Contents
  • Complete T304 Stainless Steel Catback Exhaust System
Important Installation Notice
PROFESSIONAL INSTALLATION RECOMMENDED: While this is a direct bolt-on system, professional installation is highly recommended to ensure proper fitment, valve system integration, and optimal performance. Installation requires basic exhaust work experience and appropriate lift equipment.
Installation Details
  • Installation Type: Direct bolt-on catback system with OEM mounting points
  • Skill Level: Advanced - professional installation strongly recommended
  • Tools Required: Lift/jack stands, exhaust tools, basic hand tools
  • Time Required: Approximately 2-4 hours for complete installation
  • Modifications: None required - direct fit to factory catalytic converter location
Sound Profile Characteristics
  • Refined Mode (Valves Closed) - Sophisticated tone slightly above OEM, perfect for daily driving and residential areas
  • Sport Mode (Valves Open) - Aggressive, race-inspired exhaust note with enhanced sound characteristics
  • Cold Start Enhancement - Distinctive startup sound that commands attention without excessive volume
  • Cruising Comfort - Minimal drone at highway speeds in refined mode for comfortable long-distance driving
Expert Support & Warranty
  • Live Expert Assistance - Team of BMW performance specialists ready to provide technical guidance
  • Quality Assurance - Premium T304 stainless steel construction with rigorous quality control
  • Fitment Verification - Professional support available for compatibility confirmation
  • K2 Industries Quality - Premium manufacturing standards ensuring exceptional performance and durability
Shipping Information
  • Manufacturing + Shipping:  3-5 weeks to manufacture the product. 1-2 weeks for shipping
  • Processing: Made-to-order production ensures fresh, quality-controlled components
  • Tracking: Full tracking provided with every order
  • International Shipping: Available worldwide with calculated rates at checkout
  • Secure Packaging: Professional crating ensures safe delivery of exhaust components
Our Promise To You

Every valved catback exhaust system is backed by our commitment to excellence and customer satisfaction. Experience the perfect blend of sophisticated engineering, premium T304 stainless steel construction, and advanced valve technology that transforms your BMW Z4 E89 with on-demand sound control and enhanced performance for the ultimate roadster driving experience.

Ready to transform your Z4's performance?

  1. Verify your vehicle model (E89 Z4, 2009-2016)
  2. Confirm engine variant for optimal fitment
  3. Consider professional installation for best results
  4. Complete your order and allow 15-20 days for production

Join the exclusive community of BMW Z4 enthusiasts who have elevated their roadsters with premium valved exhaust technology. Experience the freedom to switch between refined daily driving and aggressive sport exhaust at the touch of a button, while enjoying measurable performance gains and the distinctive sound that sets your Z4 apart.

Unleash your Z4's true potential - Order now to experience the perfect fusion of performance, sound, and on-demand control that defines the ultimate BMW roadster exhaust upgrade.

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.

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