BMW B58 Gen 1 / Gen 2 5in Race Downpipe - M340i, M240i, 540i

The Palenon Performance 5in B58 downpipe keeps a large diameter all the way from the turbo, stepping from 4.5in to 5in to 4in before the 3.15in OEM connection, for maximum flow on Gen 1 and Gen 2 B58 BMWs.

Why you need it

Instead of necking down to 3in at the flex joint, the pipe stays big right after the turbo for quicker spool and sharper response. Palenon quotes 30+ hp with a proper tune and a warm, deep exhaust note with pops.

Fits

• 2016+ F20 M140i; 2016-2024 F22 / F23 M240i; 2021+ G42 M240i
• 2016-2019 F30 / F31 340i; 2020-2024 G20 / G21 M340i
• 2016-2019 F32 / F33 / F36 440i; 2020-2024 G22 / G23 / G26 M440i
• 2016+ G30 540i; 2016-2023 G32 640i GT; 2016-2022 G11 / G12 740i
• 2019+ G14 / G15 / G16 840i
• 2018-2024 G01 X3 M40i and G02 X4 M40i; G05 X5 40i; G06 X6 40i; G07 X7 40i
• 2019-2024 G29 Z4 M40i
• Also fits the Toyota GR Supra A90 / A91 3.0T
• xDrive versions included

Features

• Choose catless or high-flow catted
• 5in diameter with smooth transitions
• All stainless steel, TIG welded and back-purged
• Fits RHD and LHD with no modifications
• Optional CEL delete kit (select in options)

Good to know

Intended for off-road and competition use only. Not legal for use on public roads in many areas. The catless version will set a check engine light; the CEL delete kit may not clear it on 2019+ vehicles. The high-flow catted version is not certified emissions legal. A supporting tune is recommended. Gen 3 (B58TU2) cars need a different downpipe.