BMW B58TU2 Gen 3 5in Race Downpipe - M340i, M440i, 540i, X5

The Palenon Performance 5in downpipe is engineered for the Gen 3 B58TU2 engine, built entirely from stainless steel with a stainless flex joint and inner stainless liner, TIG welded and back-purged.

Why you need it

A consistently larger diameter right after the turbo means faster spool and a deeper, more aggressive exhaust note. Palenon quotes 35+ hp with a proper tune.

Fits

• 2025+ BMW M340i / M340i xDrive (G20 LCI / G21 LCI)
• 2025+ BMW M440i / M440i xDrive (G22 / G23 / G26 LCI)
• 2024+ BMW 540i xDrive / 550e xDrive (G60 / G61)
• 2023+ BMW 735i, 740i, 740i xDrive, 750e xDrive, M760e xDrive (G70)
• 2025+ BMW X3 M50 (G45)
• 2023+ BMW X5 LCI 40i / 50e (G05), X6 LCI 40i (G06), X7 LCI 40i (G07)
• 2023+ BMW XM 50e (G09)

Features

• Choose catless or high-flow catted, OPF or non-OPF
• 5in inner / 6in outer diameter with smooth transitions
• Stainless flex joint and inner liner
• Fits RHD and LHD with no modifications
• Works with OEM and aftermarket exhausts
• 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. Pick the OPF or non-OPF version to match your car: vehicles with option code S1D0 or S1D1 have a particulate filter (OPF/GPF) in the downpipe. The catless version will set a check engine light; the CEL delete kit may not clear it. The catted version is not certified emissions legal. A supporting tune is recommended. Gen 1 and Gen 2 B58 cars need a different downpipe.