KYOSTAR 4.5 Inch Downpipe for BMW B58 3.0T M240i 340i 440i 540i 740i 840i

KYOSTAR 4.5 Inch Downpipe

Upgrade your BMW B58 3.0T engine with the KYOSTAR 4.5 Inch Downpipe. Designed for selected BMW B58 turbocharged models, including M240i, 340i, 440i, 540i, 740i and 840i applications, this downpipe helps improve exhaust flow, support quicker turbo response, and deliver a more aggressive performance exhaust sound.

The 4.5 inch downpipe design helps reduce exhaust restriction compared with the factory setup, making it a strong upgrade for street performance, tuned builds, and B58 turbo applications. Built for selected BMW B58 3.0T platforms, this downpipe is suitable for drivers looking for improved flow, sharper response, and a more performance-focused exhaust tone.

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

Important Fitment Note: Your original list included F30 M340i and F32 M440i, but those chassis normally use the 340i and 440i names. M340i and M440i are generally G-series models. Please verify your exact chassis, model year, engine, drivetrain, and downpipe layout before purchase.

Engine Note: This downpipe is intended for selected BMW B58 3.0T turbo engine models. Not compatible with N55, N54, S55, S58, B48, N20, diesel engines, naturally aspirated engines, or non-B58 applications.

Additional Note: Some 640i models, especially F12 / F13 / F06 applications, may use the N55 engine instead of B58. Please confirm engine code before ordering. Because apparently BMW decided model names should be a small punishment for anyone selling parts.

Professional installation and ECU tuning may be required. Please check local emissions regulations before installation.

Product Details