Racing 4" Downpipe Exhaust for 2015-2019 BMW N55 F01 F02 740i F10 F11 F15/F07 535i F06 F12 F13 640i E70 E71 X5 X6

SKU: XKV21072
Availability : In Stock Pre order Out of stock
$150.92 $112.84 SAVE $38.08
Fitment & Specs
Fits selected BMW N55 turbo applications, including 535i / 535i xDrive, 535i GT, 640i, X5 35iX and X6 35iX. Verify year, chassis code, and engine before purchase.
4" Inlet · 3.15" Outlet
304 Stainless Steel · Direct Bolt-On
Before You Buy: Off-road/racing use only · Professional install recommended · Tuning recommended
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Description

BMW N55 4" Racing Downpipe Overview

This 4" stainless steel racing downpipe is designed for selected BMW N55 turbo applications, helping improve exhaust flow downstream of the turbocharger while reducing restriction compared with the factory exhaust setup.

Built from 304 stainless steel with CNC-machined flanges and TIG/MIG welded construction, this downpipe is made for durability, fitment consistency, and smoother exhaust flow on compatible BMW N55 models.

Fitment

Fits selected BMW N55 turbo applications. Please verify your year, chassis code, engine, and vehicle setup before purchase.

  • 2015+ BMW 535i / 535i xDrive — F10 / F11
  • 2015+ BMW 535i GT / 535i xDrive Gran Turismo — F07
  • 2016+ BMW 640i — F06 / F12 / F13 Coupe & Convertible
  • 2014+ BMW X5 35iX — F15
  • 2015+ BMW X6 35iX — F16

Not sure if it fits? Contact us before ordering with your year, model, chassis code, and engine, and we’ll help confirm compatibility.

Key Features

  • 4" inlet and 3.15" outlet design
  • 304 stainless steel construction
  • CNC-machined stainless steel flange for improved fitment consistency
  • TIG/MIG welded construction for durability
  • Mandrel-bent tubing designed to support smoother exhaust flow
  • Direct bolt-on design for compatible BMW N55 applications

Key Specs

  • Material: 304 Stainless Steel
  • Inlet: 4"
  • Outlet: 3.15"
  • Install Type: Direct Bolt-On
  • Engine: BMW N55 Turbo
  • Application: Selected BMW 535i / 640i / X5 / X6 models

Package Includes

  • 1 × 4" Racing Downpipe

Please check the product photos and confirm all included components before installation. If your vehicle setup requires additional hardware, gaskets, or tuning support, please confirm before ordering.

Installation Notes

  • Professional installation is recommended.
  • Test fitment before final installation.
  • Please confirm clearance, chassis code, engine, and exhaust setup before installation.
  • Tuning is recommended depending on your vehicle setup.

Before You Buy

  • For off-road or racing use only where emissions laws apply.
  • Please check your local emissions regulations before purchase and installation.
  • Performance gains may vary depending on vehicle condition, supporting modifications, and tuning.
  • If you are unsure about fitment, contact us before ordering.
Shipping & Return

SHIPPING & DELIVERY
Fast Processing & Reliable Transit

  • Processing: Orders are processed and shipped from the nearest available warehouse within 1 business day after payment.
  • Delivery: Estimated delivery time is approximately 3–4 business days after shipment.
  • Shipping - Free shipping on all orders within the contiguous 48 U.S. states.

RETURNS & EXCHANGES
30-Day Hassle-Free Policy

  • Return Window: We offer a 30-day return policy from the date of delivery.
  • Item Condition: Returned items should be unused, uninstalled, and in their original packaging when possible.
  • Return 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.

Downpipe Buying Guide

A Key Section in a Turbocharged Exhaust System

The downpipe connects directly to the turbocharger and routes exhaust gases into the rest of the exhaust system. It is one of the first exhaust components downstream of the turbo.

Because of its position, the design of the downpipe influences how exhaust gases move away from the turbo and into the remaining exhaust path.

What Drivers May Observe

More consistent exhaust flow downstream of the turbocharger

Reduced restriction compared to some factory exhaust layouts

Smoother boost delivery under certain operating conditions

Changes in exhaust tone, depending on system setup

Catted vs Catless

Catted Downpipe

Includes a catalytic converter designed for specific applications
Used where emissions considerations or regulations apply
Often selected for vehicles intended for street use, where permitted

Catless Downpipe

Does not include a catalytic converter
Typically intended for off-road, competition, or export use
Used in applications where different regulatory standards apply

Is a Downpipe Right for Your Build?

Own a turbocharged vehicle

Are upgrading intake, intercooler, or exhaust components

Want improved exhaust efficiency and response

Are building a balanced street or track setup

FAST SHIPPING

Ships within 1 business day after payment
3–4 business day delivery

Secure and Reliable Checkout

Secure checkout with major payment options

LOCAL WAREHOUSE

Orders ship from U.S. warehouses when available

Easy Returns and Exchanges

30-day returns for eligible unused items

Parts Warranty

Warranty support for qualified manufacturing defects

Important Notice

Products on this site are intended for off-road, racing, or closed-course use where emissions laws apply. They are not represented as street legal, emissions-compliant, or legal for use on public roads unless explicitly stated.

Some products may remove, replace, relocate, disable, or alter emissions-related components, including but not limited to catalytic converters, EGR, DPF, SCR, DOC, O2 sensors, or related factory systems. Compatible tuning, calibration, or supporting modifications may be required to avoid engine codes or drivability issues.

Professional installation is recommended. Buyers are responsible for verifying product compatibility, local regulations, emissions requirements, and any required tuning or supporting modifications before purchase and installation.

Performance gains, sound changes, airflow improvements, temperature changes, fuel economy changes, fitment, and drivability results may vary. No specific performance gains are guaranteed.

Downpipe FAQs

What is a downpipe? +

A downpipe is the exhaust section that connects to the turbocharger and routes exhaust gases toward the rest of the exhaust system. Depending on the vehicle and product design, an upgraded downpipe may help reduce exhaust restriction and support improved turbo response when paired with the right setup.

What's the difference between catted and catless downpipes? +

A catted downpipe includes a catalytic converter, while a catless or racing downpipe does not include one and may alter or remove emissions-related equipment. Catless or racing downpipes are generally intended for off-road, racing, or closed-course use where emissions laws apply. Always check the product details and local regulations before purchase.

Will a downpipe increase horsepower? +

A downpipe may support improved exhaust flow and power potential when combined with proper tuning and supporting modifications. Horsepower and torque gains are not guaranteed and will vary depending on the vehicle, engine condition, tune, fuel, turbo setup, and overall exhaust system.

Do downpipes make the vehicle louder? +

A downpipe can change exhaust tone and may increase turbo or exhaust sound depending on the vehicle, whether the downpipe is catted or catless, and the rest of the exhaust system. Final sound level varies by setup.

Do I need tuning after installing a downpipe? +

Tuning requirements depend on the vehicle, downpipe design, emissions equipment, O2 sensor setup, and supporting modifications. Some applications may require compatible tuning or calibration to support drivability and reduce the chance of warning lights or engine codes.

Will a downpipe trigger a check engine light? +

It may, depending on the vehicle, catalytic converter configuration, O2 sensor location, and ECU calibration. Catless or racing downpipes are more likely to require supporting calibration or sensor-related solutions. Always verify the product notes and tuning requirements before installation.

Are downpipes street legal? +

Street legality depends on the downpipe design, emissions equipment, vehicle application, and local regulations. Catless, racing, or emissions-altering downpipes are generally intended for off-road, racing, or closed-course use where emissions laws apply and are not represented as street legal unless explicitly stated.

Can I use a downpipe with my stock exhaust system? +

Compatibility with a stock exhaust system depends on the vehicle and the specific downpipe design. Some downpipes are designed to connect to factory-style exhaust sections, while others may require compatible aftermarket exhaust parts, adapters, clamps, gaskets, or fabrication. Always check the product fitment and installation notes before ordering.

Are downpipes hard to install? +

Installation difficulty varies by vehicle. Some applications require tight access around the turbocharger, O2 sensors, heat shields, transmission area, or underbody. Rusted factory hardware and limited clearance can also increase installation difficulty. Professional installation is recommended.

Will a downpipe affect reliability? +

Reliability depends on product fitment, installation quality, tuning or calibration, heat management, sensor placement, gasket sealing, fastener condition, and the vehicle’s overall condition. Incorrect installation or mismatched tuning may cause drivability issues.

What should I verify before buying a downpipe? +

Verify your year, make, model, engine, turbo setup, emissions configuration, catalytic converter requirements, O2 sensor layout, flange or clamp connection, exhaust compatibility, and any tuning or calibration needs before purchase.