2012-2016 BMW 228i 320i 328i 428i N20 2.0T 4 Inch Catless Downpipe

SKU: XKV21068
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Fitment & Specs
Fits selected 2012-2016 BMW 228i, 320i, 328i and 428i F2X/F3X applications equipped with the N20 2.0L turbo engine. Not compatible with N26 SULEV applications.
4" Nominal Turbo-Side Inlet · 3.8" ID / 4.6" OD V-Band Inlet
T304 Stainless Steel · BMW F30 N20 Catless Downpipe
Before You Buy: Off-road/racing use only · Professional install recommended · May Be Required Depending on Setup
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Description

This 4 inch catless turbo downpipe is designed for selected 2012-2016 BMW F2X and F3X applications equipped with the N20 2.0L turbo engine, including compatible 228i, 320i, 328i and 428i models.

Built from T304 stainless steel with TIG-welded construction, two O2 sensor ports and an integrated flexible coupling, the downpipe uses a 4 inch nominal turbo-side inlet with a 3.8 inch ID / 4.6 inch OD V-band connection. The pipe transitions toward the downstream exhaust connection and is not a uniform 4 inch pipe from end to end.

FITMENT CORE BMW F2X / F3X

Selected 228i, 320i, 328i and 428i applications with the N20 2.0T engine.

PRODUCT TYPE 4" Catless Downpipe

Performance turbo downpipe with a 4 inch nominal turbo-side inlet.

CONSTRUCTION T304 Stainless Steel

Dual O2 ports, TIG-welded construction and integrated flexible coupling.

Important — Verify N20 vs. N26 Before Ordering

This downpipe is designed for compatible vehicles equipped with the BMW N20 2.0L turbo engine. It is not compatible with N26 SULEV applications. BMW model name alone is not sufficient to confirm fitment because some 228i, 320i, 328i and 428i applications may use a different emissions or engine configuration.

Key Details

Product Type Catless Turbo Downpipe
Engine BMW N20 2.0L Turbo I4
Application Family BMW F2X / F3X
Models 228i / 320i / 328i / 428i
Turbo-Side Inlet 4" Nominal
V-Band Connection 3.8" ID / 4.6" OD
O2 Sensor Ports 2
Flexible Coupling Integrated
Material T304 Stainless Steel
Construction TIG Welded
Included 1 × Downpipe
Engine Exclusion N26 / SULEV

Vehicle Fitment

This downpipe is intended for selected BMW F2X and F3X passenger-car applications equipped with the N20 2.0L turbo engine. Model years vary by chassis and drivetrain, so confirm your exact vehicle and engine configuration before ordering.

BMW Model Chassis Application Years Engine
228i / 228i xDrive F22 / F23 Selected 2014-2016 applications N20 2.0L Turbo
320i / 320i xDrive F30 Selected 2013-2016 applications N20 2.0L Turbo
328i / 328i xDrive F30 Selected 2012-2016 applications N20 2.0L Turbo
328i xDrive Wagon / Gran Turismo F31 / F34 Selected 2012-2016 applications N20 2.0L Turbo
428i / 428i xDrive F32 / F33 / F36 Selected 2014-2016 applications N20 2.0L Turbo
Fitment Note: Fitment is determined by the combination of model, chassis, model year and N20 engine configuration. Do not confirm compatibility by model name alone. This product is not compatible with N26 SULEV applications. Please verify the turbo-side V-band connection, O2 sensor layout and downstream exhaust connection before purchase.
Not Sure Whether Your BMW Has an N20 or N26?

Some BMW F-chassis vehicles were offered with either N20 or N26 engine configurations depending on model year, emissions specification and market. Because the turbo downpipe connection can differ, engine verification is required.

  • Check your vehicle information and engine identification before ordering.
  • Do not rely only on the 228i, 320i, 328i or 428i model badge.
  • If your vehicle is identified as an N26 / SULEV application, this downpipe is not compatible.
  • If you are unsure, contact us with your year, model, chassis and engine information before purchase.

Package Includes

  • 1 × Catless Turbo Downpipe

Only the downpipe and components visibly attached to it are confirmed as included. Please contact us before ordering if you need confirmation regarding separate gaskets, clamps, bolts or other installation hardware.

Installation Notes

Before Installation
  • Confirm the vehicle uses the N20 engine rather than the N26.
  • Compare the turbo-side V-band connection with your original downpipe.
  • Confirm O2 sensor locations and downstream exhaust connection.
  • Test fit all connections before final tightening.
During Installation
  • Professional installation is recommended.
  • No installation instructions are included.
  • Check clearance around the turbo, firewall, transmission area and underbody.
  • Keep wiring and O2 sensor harnesses away from heat and moving components.

Old, rusted or seized factory exhaust hardware may increase installation difficulty. After installation, inspect all exhaust connections for leaks and recheck applicable clamps or fasteners after initial heat cycles.

Catless downpipe installation may require compatible tuning, calibration or sensor-related solutions depending on the vehicle setup. Incorrect sensor configuration, calibration or exhaust sealing may cause warning lights, engine codes, drivability issues or failed readiness checks.

BEFORE YOU BUY
Confirm Your Engine and Connection Layout
  • Designed for selected 2012-2016 BMW F2X / F3X 228i, 320i, 328i and 428i applications equipped with the N20 2.0L turbo engine.
  • Not compatible with N26 SULEV applications.
  • The 4 inch specification refers to the nominal turbo-side inlet area; this is not a uniform 4 inch pipe from end to end.
  • Turbo-side V-band connection is listed as 3.8" ID / 4.6" OD.
  • Verify model year, chassis, engine, drivetrain, V-band connection, O2 sensor layout and downstream exhaust connection before purchase.
  • This product does not include a catalytic converter and may alter emissions-related exhaust components.
  • Compatible tuning, calibration or sensor-related solutions may be required depending on vehicle configuration.
  • Intended for off-road, racing, competition or closed-course use where applicable. Check local regulations before installation.
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.