2012-2016 BMW F30 F32 335i 435i 3.0L I6 Blue Burn Carbon Axle Back Muffler Exhaust Pipe Kit

SKU: XKV41063
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Description

This BMW exhaust kit is designed to increase the exhaust flow and let your engine breathe better. It has stainless steel construction and polished finish, 100% real dry carbon with 6 pt install to ensure they never move. Overall weight reduction from stock mufflers of approx. 45lbs.

Features

  • 4.25" OD Carbon Tips (Inner steel tip 3.75" OD)
  • 3" ID Inlet Piping
  • 2.25" ID Outlet piping
  • Please note this requires the cutting of the factory exhaust near the factory break point.
  • No installation instructions, please refer to a shop/factory manual for installation.

Fitment

  • 2012-2015 BMW 3 Series F30 335i 3.0L I6
  • 2014-2016 BMW 4 Series F32 435i 3.0L I6

VEHICLE NAME YEAR ENGINE
BMW 335i 2012~2015 3.0L
BMW 335i GT xDrive 2014~2015 3.0L
BMW 335i xDrive 2012~2015 3.0L
BMW 335is 2012~2013 3.0L
BMW 435i 2014~2016 3.0L
BMW 435i Gran Coupe 2015~2016 3.0L
BMW 435i xDrive 2014~2016 3.0L
BMW 435i xDrive Gran Coupe 2015~2016 3.0L
Shipping & Return

SHIPPING & DELIVERY
Fast Processing & Reliable Transit

  • Processing: Orders are processed and shipped from the nearest warehouse within 24 hours.
  • Delivery: Estimated delivery time is approximately 4 to 5 business days.

RETURNS & EXCHANGES
30-Day Hassle-Free Policy

  • Return Window: We offer a 30-day return policy from the date of delivery.
  • Process: To initiate a return or exchange, please contact our customer service team first to receive authorization and instructions.

WARRANTY
2-Year Limited Replacement Warranty

  • Duration: All products are backed by a 2-year limited warranty.
  • Coverage: This warranty covers manufacturing defects and product failures under normal use, and provides a replacement for qualified cases (repairs are not performed).

CUSTOMER SUPPORT
We’re Here to Help – Contact Us First

  • Priority Contact: For any order-related issues—including returns, warranty claims, or general inquiries—please contact us first before taking further action. We are committed to resolving your concern promptly.
  • Feedback Notice: If you are unsatisfied, we kindly ask that you allow us an opportunity to address the issue before leaving neutral or negative feedback.
  • Email Support: You can reach us at support@XKVracing.com.

Understanding a Cat-Back Exhaust System

A cat-back exhaust system replaces the exhaust components from the catalytic converter to the rear of the vehicle. This section of the exhaust is downstream of emissions-control devices and does not alter their function.

Because of its position, a cat-back system primarily affects how exhaust gases are routed after they exit the catalytic converter, as well as overall sound characteristics.

Exhaust Sound Characteristics

Cat-back exhaust systems are designed with sound control in mind. Muffler design, piping layout, and vehicle platform all influence how the exhaust sounds during different driving conditions.

Sound characteristics can vary by application, allowing drivers to choose setups that align with their preferences while maintaining reasonable cabin comfort.

What Drivers Commonly Notice

Changes in exhaust tone compared to the factory system

Smoother exhaust flow through the rear section of the system

Reduced restriction in the post-catalyst exhaust path

A different overall driving feel, without altering emissions components

When a Cat-Back System Is Typically Considered

Want to change exhaust sound characteristics

Are replacing or updating rear exhaust components

Prefer a bolt-on exhaust solution

Wish to avoid modifications to emissions-control systems

FAST SHIPPING

1-business-day shipping after payment
3-4 business day delivery

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LOCAL WAREHOUSE

Orders ship from US warehouses

Easy Returns and Exchanges

30-Day Hassle-Free Returns and Exchanges

Parts Warranty

2-Year Warranty

Important Notice

Products on this site are for off-road/racing use only and are not legal for public roads where emissions laws apply.

Professional installation recommended. Removing emissions equipment (DPF, CAT, SCR, DOC) requires deleting related sensors and a compatible tuner to avoid engine codes.

Performance gains may vary—no guarantees.

Frequently Asked Questions

What is an Up Pipe? +
An up pipe is the exhaust pipe that connects the exhaust manifold (or cylinder head) to the turbocharger's turbine inlet on turbocharged vehicles. It carries hot exhaust gases from the engine to spin the turbo.
Why upgrade the factory up pipe? +
Many factory up pipes contain a restrictive catalytic converter (pre-turbo cat) or have restrictive flex joints that can fail. An aftermarket up pipe improves exhaust flow to the turbo, reduces turbo lag, and eliminates a common failure point.
Will an aftermarket up pipe increase horsepower? +
Yes, especially if your factory pipe contains a catalytic converter. By improving flow to the turbo, it allows the turbo to spool faster and more efficiently, translating to better throttle response and power gains throughout the RPM range.
Do up pipes make the turbo louder? +
You may hear more turbo spool sound as the exhaust flows more freely. Removing a pre-turbo catalytic converter can also make the overall exhaust note slightly more aggressive.
Do I need tuning after installing an up pipe? +
For up pipes that remove a catalytic converter, tuning is highly recommended to prevent a check engine light (for missing cat efficiency) and to optimize performance gains. For catless replacement pipes on otherwise stock cars, it may run fine, but a tune maximizes benefits.
Are aftermarket up pipes street legal? +
Up pipes that remove the pre-turbo catalytic converter are not street legal under federal EPA regulations as they modify an emissions system. They are sold for off-road and competition use only. Always check your local laws.
Is this a common upgrade for Subaru WRX/STI? +
Yes, it's one of the most recommended first modifications for turbo Subarus (especially older models). The factory up pipe contains a catalytic converter that can fail, sending debris into the turbo and causing catastrophic damage.
Are up pipes difficult to install? +
Installation difficulty is moderate to high, as it's located between the engine and the turbo in a tight space. It often requires removing other components for access. Professional installation is recommended for most DIY enthusiasts.
What are the reliability benefits? +
Eliminates the risk of a failing pre-turbo catalytic converter damaging the turbocharger. It also removes restrictive flex joints that are prone to cracking and leaking over time, which can cause performance loss and be a fire hazard.