IRL 400 Cell Catted Downpipes BMW G8X M2/M3/M4 S58 (2021-2025) G80 G82 G83 G87 - 30 WHP Gain
IRL 400 Cell Catted Downpipes BMW G8X M2/M3/M4 S58 (2021-2025) G80 G82 G83 G87 - 30 WHP Gain
Fitment Information
- BMW M2 G87 Coupe S58 3.0L Twin Turbo (2023, 2024, 2025), RWD
- BMW M3 G80 Sedan S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- BMW M3 G81 Touring S58 3.0L Twin Turbo (2023, 2024, 2025), RWD and xDrive
- BMW M4 G82 Coupe S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- BMW M4 G83 Convertible S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- Note: For off-road, track, and competition use only. Not street legal. Not legal on any vehicle subject to state safety inspection.
Fitment Note: These downpipes fit the S58 twin-turbo inline-6 across all G8X M variants, covering the M2 G87, M3 G80/G81, and M4 G82/G83, in both RWD and xDrive configurations. A tune is required after installation to suppress check engine lights and unlock the full power gain potential. Running these without a tune will result in CEL codes.
Does not ship to California. Per IRL and applicable federal and state law, these products are not designed or intended to be used on any highway-registered vehicle. Sold as a pair. Even though these have 400 cell catalytic converters, these are for off-road, track, and competition use only.
Specs and Features
- High performance direct replacement downpipes
- 30 whp gain on a tuned S58 with stock turbos
- 400 cell high-flow catalytic converter, the highest catalyst density catted option in IRL's downpipe lineup.
- Eliminates backpressure caused by stock catalytic converters for faster turbo spool and higher peak power
- Flex pipe section included to reduce stress and unwanted vibration on the downpipe connection
- Sold as a pair (both downpipes for the twin-turbo S58 included)
- Tune required after installation
- For off-road, track, and competition use only.
Pairs well with:
- IRL V2 Exhaust Valve Controller for BMW B58 / S58 (G80 M3, G82/G83 M4, G87 M2) If you are running or planning to run an IRL catback exhaust alongside these downpipes, the V2 Valve Controller lets you open the factory exhaust valves to 100% on demand rather than being limited by BMW's non-full-open factory valve behavior, giving you complete control over sound and flow from the same brand.
The 400 cell sits in the middle of IRL's three downpipe options for this platform. The 400 cell is the highest-density catted option, retaining more catalyst material than either of the others while still meaningfully improving flow over the factory downpipes. Most street-track builds running a stage 2 tune land on the 400 cell as the right balance of performance and retained emissions equipment. Whatever you pick, a tune is not optional here. Running these without one will give you check engine lights immediately, and more importantly, you will leave significant power on the table since the factory ECU is not calibrated for the change in exhaust backpressure. Sort the tune before or immediately after the install.
IRL 400 Cell Catted Downpipes BMW G8X M2/M3/M4 S58 (2021-2025) G80 G82 G83 G87 - 30 WHP Gain
Fitment Information
- BMW M2 G87 Coupe S58 3.0L Twin Turbo (2023, 2024, 2025), RWD
- BMW M3 G80 Sedan S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- BMW M3 G81 Touring S58 3.0L Twin Turbo (2023, 2024, 2025), RWD and xDrive
- BMW M4 G82 Coupe S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- BMW M4 G83 Convertible S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- Note: For off-road, track, and competition use only. Not street legal. Not legal on any vehicle subject to state safety inspection.
Fitment Note: These downpipes fit the S58 twin-turbo inline-6 across all G8X M variants, covering the M2 G87, M3 G80/G81, and M4 G82/G83, in both RWD and xDrive configurations. A tune is required after installation to suppress check engine lights and unlock the full power gain potential. Running these without a tune will result in CEL codes.
Does not ship to California. Per IRL and applicable federal and state law, these products are not designed or intended to be used on any highway-registered vehicle. Sold as a pair. Even though these have 400 cell catalytic converters, these are for off-road, track, and competition use only.
Specs and Features
- High performance direct replacement downpipes
- 30 whp gain on a tuned S58 with stock turbos
- 400 cell high-flow catalytic converter, the highest catalyst density catted option in IRL's downpipe lineup.
- Eliminates backpressure caused by stock catalytic converters for faster turbo spool and higher peak power
- Flex pipe section included to reduce stress and unwanted vibration on the downpipe connection
- Sold as a pair (both downpipes for the twin-turbo S58 included)
- Tune required after installation
- For off-road, track, and competition use only.
Pairs well with:
- IRL V2 Exhaust Valve Controller for BMW B58 / S58 (G80 M3, G82/G83 M4, G87 M2) If you are running or planning to run an IRL catback exhaust alongside these downpipes, the V2 Valve Controller lets you open the factory exhaust valves to 100% on demand rather than being limited by BMW's non-full-open factory valve behavior, giving you complete control over sound and flow from the same brand.
The 400 cell sits in the middle of IRL's three downpipe options for this platform. The 400 cell is the highest-density catted option, retaining more catalyst material than either of the others while still meaningfully improving flow over the factory downpipes. Most street-track builds running a stage 2 tune land on the 400 cell as the right balance of performance and retained emissions equipment. Whatever you pick, a tune is not optional here. Running these without one will give you check engine lights immediately, and more importantly, you will leave significant power on the table since the factory ECU is not calibrated for the change in exhaust backpressure. Sort the tune before or immediately after the install.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Fitment Information
- BMW M2 G87 Coupe S58 3.0L Twin Turbo (2023, 2024, 2025), RWD
- BMW M3 G80 Sedan S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- BMW M3 G81 Touring S58 3.0L Twin Turbo (2023, 2024, 2025), RWD and xDrive
- BMW M4 G82 Coupe S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- BMW M4 G83 Convertible S58 3.0L Twin Turbo (2021, 2022, 2023, 2024, 2025), RWD and xDrive
- Note: For off-road, track, and competition use only. Not street legal. Not legal on any vehicle subject to state safety inspection.
Fitment Note: These downpipes fit the S58 twin-turbo inline-6 across all G8X M variants, covering the M2 G87, M3 G80/G81, and M4 G82/G83, in both RWD and xDrive configurations. A tune is required after installation to suppress check engine lights and unlock the full power gain potential. Running these without a tune will result in CEL codes.
Does not ship to California. Per IRL and applicable federal and state law, these products are not designed or intended to be used on any highway-registered vehicle. Sold as a pair. Even though these have 400 cell catalytic converters, these are for off-road, track, and competition use only.
Specs and Features
- High performance direct replacement downpipes
- 30 whp gain on a tuned S58 with stock turbos
- 400 cell high-flow catalytic converter, the highest catalyst density catted option in IRL's downpipe lineup.
- Eliminates backpressure caused by stock catalytic converters for faster turbo spool and higher peak power
- Flex pipe section included to reduce stress and unwanted vibration on the downpipe connection
- Sold as a pair (both downpipes for the twin-turbo S58 included)
- Tune required after installation
- For off-road, track, and competition use only.
Pairs well with:
- IRL V2 Exhaust Valve Controller for BMW B58 / S58 (G80 M3, G82/G83 M4, G87 M2) If you are running or planning to run an IRL catback exhaust alongside these downpipes, the V2 Valve Controller lets you open the factory exhaust valves to 100% on demand rather than being limited by BMW's non-full-open factory valve behavior, giving you complete control over sound and flow from the same brand.
The 400 cell sits in the middle of IRL's three downpipe options for this platform. The 400 cell is the highest-density catted option, retaining more catalyst material than either of the others while still meaningfully improving flow over the factory downpipes. Most street-track builds running a stage 2 tune land on the 400 cell as the right balance of performance and retained emissions equipment. Whatever you pick, a tune is not optional here. Running these without one will give you check engine lights immediately, and more importantly, you will leave significant power on the table since the factory ECU is not calibrated for the change in exhaust backpressure. Sort the tune before or immediately after the install.
