4.5 Inch Car Exhaust Downpipe For BMW B58 3.0T M240i 340i 440i 540i 740i 840i

KYOSTAR 4.5 Inch Downpipe

The KYOSTAR 4.5 Inch Downpipe is designed for selected BMW B58 3.0T Twin-Turbo Inline-6 engines, providing improved exhaust flow efficiency and reduced restriction compared with the factory downpipe system. Designed for BMW M240i, 340i, 440i, 540i, 640i GT, 740i, and 840i applications, this upgrade supports quicker turbo response and a more aggressive performance exhaust tone.

Featuring a high-flow 4.5 inch pipe design, this downpipe provides a more direct exhaust path for B58 turbocharged applications. It is an ideal upgrade for street performance vehicles, tuned builds, and turbo upgrade setups where improved exhaust flow, sharper response, and increased performance potential are required.

Features

• High-flow 4.5 inch downpipe design reduces exhaust restriction and improves exhaust flow efficiency.

• Supports quicker turbo response and improved exhaust pulse flow for BMW B58 3.0T turbo engines.

• Durable stainless steel construction provides reliable performance under high exhaust temperatures.

• Designed for tuned B58 applications requiring improved exhaust flow and performance capability.

• Provides a more aggressive exhaust tone while supporting street and performance-focused builds.

Fitment

• 2016-2022 BMW F22 / F23 M240i B58 3.0T

• 2016-2022 BMW F30 / F31 340i B58 3.0T

• 2016-2022 BMW F32 / F33 / F36 440i B58 3.0T

• 2016-2022 BMW G30 540i B58 3.0T

• 2016-2022 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 Engine: Designed for selected BMW B58 3.0L Twin-Turbo Inline-6 engine applications only.

Incompatible Engine: Not compatible with N55, N54, S55, S58, B48, N20, diesel, naturally aspirated, or other BMW engine platforms.

Verify Vehicle: Please verify your vehicle chassis code, model year, engine code, drivetrain, and factory downpipe configuration before ordering.

Exhaust System: Designed for B58 turbocharged applications requiring increased exhaust flow and reduced restriction.

Vehicle specifications may vary depending on production date, market, and previous modifications. Some BMW models share similar names but use different engine platforms. Please confirm your exact engine code and compare your original downpipe layout before installation.

Emissions Notice: Depending on your region and vehicle configuration, aftermarket downpipes may affect emissions compliance. Please check local regulations before installation.

Professional Installation: Proper installation is recommended. ECU tuning may be required depending on vehicle setup and local requirements.

Product Details

FAQ

Q1: Will this fit my vehicle?

This KYOSTAR 4.5 Inch Downpipe is designed for selected BMW models equipped with the B58 3.0T Twin-Turbo engine, including M240i, 340i, 440i, 540i, 640i GT, 740i, and 840i applications. Please confirm your chassis and engine code before purchase.

Q2: Does installation require modification?

Installation requirements may vary depending on vehicle configuration, exhaust setup, and previous modifications. Professional installation is recommended for proper alignment and sealing.

Q3: Does this improve performance?

The larger 4.5 inch pipe design helps improve exhaust flow and reduce restriction, supporting faster turbo response and improved performance potential on tuned B58 applications.

Warranty & Shipping

KYOSTAR products are inspected before shipment to ensure quality and reliability. Each downpipe is securely packaged to prevent transportation damage. Please contact our support team if you need assistance with installation or product-related issues.