BMW B58 Downpipes
Downpipes for the BMW B58 3.0L turbo inline-six, covering Gen 1, Gen 2 and the Gen 3 B58TU2. Cars include the M140i, M240i, 340i and M340i, 440i and M440i and 540i, the X5 on the Gen...
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BMW models
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BMW B58 Gen 1 / Gen 2 4.5in Race Downpipe V1 - M340i, M240i, 540i -
BMW B58TU2 Gen 3 5in Race Downpipe - M340i, M440i, 540i, X5 -
BMW B58 Gen 1 / Gen 2 5in Race Downpipe - M340i, M240i, 540i -
BMW B58 Gen 1 / Gen 2 4.5in Race Downpipe V2 - M340i, M240i, 540i -
BMW Gen 1 & 2 B58 Rvng 5" XL Flow Downpipe (Also Fits Supra) -
RVNG 6" XL Flow Downpipe BMW Gen 3 B58 (B58TU2) -
B58 Stainless Steel Downpipe Upgrade 4.5" [Race Downpipes] -
B58 5 Inch Stainless Steel 200 CELL Euro 5 Catted Downpipe Upgrade [Race Downpipes] -
B58 5 Inch Stainless Steel Downpipe Upgrade [Race Downpipes] -
BMW B58 / Toyota B58 Gen 3 Race Downpipe -
BMW F30 340i B58 MaxFlow Downpipe | IRL -
IRL B58 Gen 3 MaxFlow Downpipe -
BMW G-Series B58 Gen 2 MaxFlow Downpipe, Race 200 or 400 Cell
About BMW B58 Downpipes
Downpipes for the BMW B58 3.0L turbo inline-six, covering Gen 1, Gen 2 and the Gen 3 B58TU2. Cars include the M140i, M240i, 340i and M340i, 440i and M440i and 540i, the X5 on the Gen 3 listing, and the Toyota GR Supra on the listings that say so. Pipe sizes run from 4.5" to 6", and options include catless, high-flow catted and 200 or 400-cell versions.
Brands are Spool Performance, Palenon Performance, IRL and Rvng RaceWorks. The B58 changed between generations, so confirm Gen 1, Gen 2 or Gen 3 (and OPF or non-OPF on Gen 3) before ordering. Catless and high-flow downpipes are intended for off-road / competition use and may not be legal for road use in your area.
See BMW B-Series (B38 / B48 / B58) or all exhaust and downpipes.
Frequently asked questions
How do I know which B58 generation my car has?
Gen 1 covers cars such as the F30 340i, F22 M240i and G01 X3 M40i; Gen 2 covers cars such as the 2020-2024 G20 M340i, G42 M240i and G05 X5 40i; Gen 3 (B58TU2) covers 2025+ LCI cars such as the M340i and M440i. Years overlap at changeovers, so confirm with your VIN. See our B58 downpipe guide.
Will a Gen 1 B58 downpipe fit a Gen 2 car?
Sometimes. Palenon and Rvng build one pipe for both Gen 1 and Gen 2 and list both in the fitment, while IRL sells separate Gen 1 and Gen 2 pipes. Follow the fitment list on the listing, and never fit a Gen 1 or Gen 2 pipe to a Gen 3 B58TU2.
Does a B58 downpipe fit the Toyota Supra?
Only where the listing says so. The Rvng 5 inch XL Flow pipe for Gen 1 and Gen 2 is listed as also fitting the Supra, and the Spool Gen 3 race downpipe is listed for both the BMW and Toyota B58 Gen 3. Check the fitment list before ordering.
Which pipe size should I choose?
B58 pipes come in 4, 4.5, 5 and 6 inch designs. For a stock-turbo car with a tune, 4.5 to 5 inch is the common range; the 6 inch Rvng Gen 3 pipe is aimed at higher-power builds. Sound changes with size too, and Spool describes its 5 inch pipe as deeper in tone.
Do I need a tune for a B58 downpipe?
The listings recommend a supporting tune, and a check-engine light may occur without one. Plan the tune before the install. Most B58 pipes are race designs; IRL Gen 2 pipes also come in 200 or 400-cell, and Spool offers a 200-cell catted 5 inch pipe.
Are catless downpipes legal on the street?
Catless and high-flow downpipes and other emissions-related parts are intended for off-road and competition use and may not be legal on the street where you live. A high-flow converter is not the same as a certified replacement part, so check your local laws and inspection rules before you buy or install one.