4.5" BMW M340i Catless Downpipe For 2016-2022 F22 F30 F32 M240i M440i B58 3.0T

Product Specification

KYOSTAR 4.5" Catless Downpipe for 2016-2022 BMW F22 F30 F32 M240i M340i M440i B58 3.0T

The KYOSTAR 4.5" Catless Downpipe is designed for BMW F-Series and G-Series models equipped with the B58 3.0T turbocharged inline-six engine. Featuring a large 4.5-inch high-flow pipe design, this downpipe reduces factory exhaust restriction, improves exhaust flow, and helps enhance turbo response under increased boost conditions.

Manufactured from durable stainless steel with optimized exhaust routing, this performance downpipe improves exhaust pulse flow and delivers a more aggressive turbo exhaust tone. Designed for modified BMW B58 applications, ECU tuning is recommended after installation to properly optimize engine performance and manage oxygen sensor readings.

Features

• Large 4.5-inch high-flow design reduces exhaust restriction and improves overall exhaust flow efficiency.

• Enhances turbo response and exhaust pulse flow for BMW B58 3.0T turbocharged engines.

• Manufactured from durable stainless steel for reliable performance under high exhaust temperatures.

• Optimized exhaust routing provides improved airflow characteristics for modified BMW B58 platforms.

• Creates a deeper and more aggressive turbo exhaust tone compared with the factory exhaust system.

Fitment

• 2016-2022 BMW F22 M240i B58 3.0T

• 2016-2022 BMW F23 M240i B58 3.0T

• 2016-2019 BMW F30 M340i B58 3.0T

• 2016-2019 BMW F31 M340i B58 3.0T

• 2017-2020 BMW F32 M440i B58 3.0T

• 2017-2020 BMW F33 M440i B58 3.0T

• 2017-2020 BMW F36 M440i B58 3.0T

• 2017-2022 BMW G30 540i B58 3.0T

• 2018-2022 BMW G32 640i GT B58 3.0T

• 2016-2022 BMW G11 G12 740i B58 3.0T

• 2018-2022 BMW G14 G15 840i B58 3.0T

Notes

Compatible Vehicle: Designed for BMW M240i, M340i, M440i, 540i, 640i, 740i, and 840i models equipped with the B58 3.0T Turbo L6 engine.

Incompatible Vehicle: Not compatible with N55, S55, S58, B58TU, or other engine platforms.

Verify Vehicle: Please confirm your vehicle year, chassis code, engine configuration, turbo outlet connection, exhaust mounting points, O2 sensor locations, and exhaust setup before ordering.

Installation: Professional installation is recommended. Because this is a catless downpipe, ECU tuning or calibration may be required to optimize engine performance and properly manage oxygen sensor-related parameters.

Important: Removing the factory catalytic converter may trigger a check engine light. This product is intended for off-road and racing applications only where permitted. Please check local emissions regulations before installation.

Product Details

FAQ

Q1: Will this fit my vehicle?

This 4.5" catless downpipe is designed for BMW M240i, M340i, M440i, 540i, 640i, 740i, and 840i models equipped with the B58 3.0T engine. Please confirm your chassis, production year, and engine configuration before purchase.

Q2: Does installation require modification?

The KYOSTAR 4.5" Catless Downpipe is designed with optimized exhaust routing for compatible BMW B58 applications. Professional installation is recommended for proper alignment and exhaust sealing.

Q3: Does this require ECU tuning?

ECU tuning or calibration may be required after installing a catless downpipe to properly manage oxygen sensor-related changes, optimize engine parameters, and improve overall performance.

Q4: What performance benefits does this provide?

The KYOSTAR 4.5" Catless Downpipe improves exhaust flow efficiency, reduces factory exhaust restriction, enhances turbocharger response, and delivers a more aggressive turbo exhaust tone for BMW B58 3.0T turbocharged applications.

Professional installation is recommended.

KYOSTAR products are quality inspected before shipment. Please contact our support team for installation assistance or after-sales support.