Click to zoom in
Deep B58 Sound and Real Weight Savings for Your G42 BMW M240i With Zero ECU Flashing
The Akrapovic S-BM/T/32H Slip-On Line delivers measurable performance and a transformed exhaust character for the 2022 to 2025 BMW M240i and M240i xDrive without touching the engine tune. Built around a full titanium muffler assembly with hand-crafted carbon fiber tips, the S-BM/T/32H saves 4.0 kg over the OEM system and adds 7.1 kW at 2,450 rpm and 20.5 Nm of torque at the same point, directly improving throttle response and mid-range pull. Two active valves work with the factory chassis electronics for quiet cruising or an aggressive open note on demand. Compatible with OPF and non-OPF G42 variants and ECE type-approved for European road use. Note: The BMW OEM actuator part number 18 30 8 686 640 is required for full active valve function and must be sourced separately from a BMW dealer.
Key Features
- Full Titanium Muffler Body Aerospace-grade titanium construction for superior heat resistance and a 4.0 kg weight reduction over the stock G42 exhaust
- Carbon Fiber Exhaust Tips Hand-laminated carbon fiber tips with Akrapovic laser-etched branding for a premium rear end appearance
- Dyno-Proven Power Gains +7.1 kW at 2,450 rpm and +20.5 Nm torque at 2,450 rpm on the BMW B58 3.0L inline-six
- Dual Active Valve System Two electronically controlled exhaust valves retain factory sound mode integration for quiet or sport operation
- OPF and Non-OPF Compatible Fitment confirmed for both particulate filter-equipped and non-OPF G42 M240i models across all production years
- ECE Type Approved Meets European emissions certification for OPF-equipped vehicles; street legal for road use in compliant markets
- No Cutting or Welding Required Direct bolt-on replacement using factory hanger points and connection flanges
- Handcrafted in Slovenia Produced at Akrapovic's Ivancna Gorica factory alongside motorsport exhaust systems
This Part Fits
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2022-2025 | BMW | M240i | M240i |
| 2022-2025 | BMW | M240i | M240i xDrive |
Specifications
| Detail | Value |
|---|---|
| MPN | S-BM/T/32H |
| UPC | 3831126410834 |
| Brand | Akrapovic |
| System Type | Slip-On Line (rear muffler replacement) |
| Primary Material | Titanium |
| Tip Material | Carbon fiber (hand-laminated) |
| Power Gain | +7.1 kW (9.7 hp) at 2,450 rpm |
| Torque Gain | +20.5 Nm at 2,450 rpm |
| Weight Reduction | 4.0 kg vs. OEM |
| Valve System | 2 active exhaust valves (factory integration) |
| Required BMW Part | OEM actuator 18 30 8 686 640 (sold separately) |
| Compatible Chassis | BMW G42 (M240i Coupe, 2022-2025) |
| Engine | B58 3.0L Inline-6 TwinPower Turbo |
| OPF Compatibility | OPF and non-OPF variants |
| Approval | ECE type-approved (OPF vehicles) |
| Country of Origin | Slovenia |
| Warranty | 3-year manufacturer warranty |
What's Included
- Titanium slip-on rear muffler assembly with carbon fiber tips (S-BM/T/32H)
- Stainless steel mounting clamps and hardware kit
- Akrapovic installation instructions with torque specifications
Frequently Asked Questions
Does the Akrapovic S-BM/T/32H require the BMW OEM actuator part 18 30 8 686 640?Yes. To retain full active valve functionality with your factory driving modes, you need BMW OEM actuator part number 18 30 8 686 640, which must be ordered from a BMW dealer. The S-BM/T/32H muffler will physically install without it, but valve control will not operate correctly until the actuator is fitted.
Will this fit my 2022 BMW M240i with the OPF particulate filter?Yes. The S-BM/T/32H was developed specifically for the G42 platform and is confirmed compatible with both OPF and non-OPF equipped M240i models across all production years 2022 through 2025. Fitment is identical for both variants.
Does it fit the M240i xDrive all-wheel-drive model?Yes. Both the rear-wheel-drive M240i and the all-wheel-drive M240i xDrive share the same G42 exhaust configuration. The S-BM/T/32H fits both drivetrain variants without modification.
How much power does the Akrapovic S-BM/T/32H add to the BMW M240i?On the G42 M240i with the B58 3.0L inline-six, Akrapovic dyno results show gains of 7.1 kW (9.7 hp) at 2,450 rpm and 20.5 Nm of additional torque at the same rpm. These gains are particularly noticeable in the mid-range where the B58 already builds strong pull.
Is the S-BM/T/32H ECE certified for road use?Yes, with one condition. The ECE type approval is valid for G42 M240i vehicles equipped with the Otto particulate filter (OPF). For non-OPF vehicles, the system fits but does not carry ECE certification for on-road use in European markets. In the US, OEM-downstream slip-on systems typically do not affect emissions compliance.
How long does installation take on the G42 M240i?Installation on a lift with hand tools takes approximately 3 to 4 hours when the BMW OEM actuator is also being fitted. The slip-on muffler itself is a direct bolt-on requiring no cutting. Professional installation at a shop familiar with Akrapovic systems is strongly recommended.
What does the exhaust note sound like on the M240i with the S-BM/T/32H?With valves closed the S-BM/T/32H produces a sound level close to stock, making it practical for daily driving and noise-restricted environments. With valves open the tone becomes significantly deeper and more aggressive, with a clear B58 inline-six character across the mid and upper rpm range.
Can I use the Akrapovic smartphone app or sound remote with this system?The S-BM/T/32H integrates with the factory BMW active exhaust valve system rather than using Akrapovic's standalone sound kit. Valve control is managed through the factory driving modes and the OEM actuator rather than a separate Akrapovic controller.
What is the warranty on the Akrapovic S-BM/T/32H?Akrapovic covers the S-BM/T/32H with a 3-year manufacturer warranty against defects in materials and workmanship under normal street use conditions.
Installation Overview
- Lift and safely support the vehicle on jack stands or a 4-post lift
- Allow the factory exhaust to cool fully before beginning any work
- Remove the factory rear muffler clamps and disconnect from the OEM rubber hangers
- Lower and remove the OEM rear muffler assembly
- Install the BMW OEM actuator 18 30 8 686 640 per BMW instructions if not already fitted
- Slide the Akrapovic S-BM/T/32H muffler onto the factory center pipe connection
- Connect valve actuator wiring harness to the OEM plug
- Hang the muffler on the factory rubber isolators and check tip alignment in the rear bumper cutouts
- Install and hand-tighten all Akrapovic clamps before final alignment check
- Torque all clamps to specification, start the vehicle, and verify no exhaust leaks and correct valve operation across all drive modes
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
Akrapovic
Akrapovic Exhaust Systems and Carbon Accessories are stocked at Black Ops Auto Works for Porsche 911, BMW M, Audi RS, Ferrari, Lamborghini, McLaren, Mercedes-AMG, C8 Corvette, Nissan GT-R, and select performance motorcycle builds. Shop Slip-On Line titanium exhausts, Evolution Line exhausts, Race Line systems, cat-back systems, link pipes, downpipes, sound kits, carbon fiber tips, titanium tail pipe sets, rear diffusers, and carbon accessories for the correct vehicle and build goal. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 161 Akrapovic Exhaust Systems and Carbon Accessories SKUs across exhaust system layouts, titanium components, tail pipe designs, valve controls, and vehicle-specific platforms. What This Akrapovic Collection Covers Premium titanium exhaust engineering Akrapovic products pair vehicle-specific engineering with titanium construction, precision exhaust rout...
View Akrapovic Products
BMW M Series Models Parts & Accessories
BMW M Series parts and accessories for M2, M3, M4, M5, and M8 models are stocked at Black Ops Auto Works. Shop cat-back and slip-on exhaust systems, carbon fiber tail pipes, headlight and taillight upgrades, carbon fiber hoods and grilles, intake valves, engine components, water pumps, and interior accessories for E46, E90, E92, F80, F82, F90, G80, G82, G87, and G90 chassis codes. Every product is filterable by year, make, model, chassis code, and trim so the correct part ships the first time. Black Ops Auto Works carries 1,328 BMW M Series SKUs across exhaust, lighting, engine, exterior, and interior categories. What This Collection Covers BMW M Series models span multiple chassis generations with different engine platforms, from the naturally aspirated S54 and S65 engines to the twin-turbo S55 and S58 engines found in current M3 and M4 models. This collection groups parts confirmed to fit the specific M chassis code and engine so E46 M3 owners, F80/F82 owners, and G80/G82 S58 ...
View BMW M Series Models Parts & Accessories Products
Exhaust Systems
Performance exhaust systems for cars, trucks, SUVs, and Jeeps are stocked at Black Ops Auto Works. Shop cat-back systems, axle-back systems, turbo-back systems, headers, downpipes, mid-pipes, mufflers, resonators, catalytic converters, exhaust tips, exhaust valve controllers, oxygen sensors, exhaust brakes, and motorcycle and powersports exhausts for Mustang, Camaro, Challenger, Corvette, Silverado, and Super Duty platforms. Every product is filterable by exhaust position, material, pipe diameter, and vehicle year, make, model, and trim so the correct fitment ships the first time. Black Ops Auto Works carries 7,441 exhaust SKUs across every position of the exhaust system. What This Category Covers Exhaust upgrades change sound, appearance, and in some cases power. Exhaust fitment depends on engine, drivetrain, and factory exit position, so confirm the exact platform before ordering any exhaust component. Exhaust Position Cat-back, axle-back, turbo-back, and header-back systems e...
View Exhaust Systems Products
Mufflers
Performance mufflers for street, track, and show builds are stocked at Black Ops Auto Works. Shop chambered mufflers, straight-through mufflers, tuned resonators, slip-on exhaust systems, and universal weld-in mufflers in stainless steel and titanium for HEMI, Hellcat, Trackhawk, TRX, LS, LT, Coyote, EcoBoost, Porsche, BMW, and import platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 434 muffler SKUs across inlet size, outlet configuration, and sound level categories. What This Category Covers The Mufflers collection spans direct-fit muffler replacements, universal weld-in mufflers for custom exhaust builds, and complete slip-on exhaust systems for European sports cars. The catalog is strongest on Gibson, Corsa, MagnaFlow, MBRP, and GReddy mufflers for domestic trucks and muscle cars, with premium Akrapovic titanium slip-on systems for Porsche, BMW, and Ferrari platform...
View Mufflers Products
Mufflers & Resonators
Mufflers and resonators for cars, trucks, SUVs, and Jeeps are stocked at Black Ops Auto Works. Shop chambered mufflers, straight-through mufflers, turbo mufflers, muffler silencers, muffler delete pipes, standalone resonators, and slip-on exhaust systems for Mustang, Camaro, Challenger, Corvette, Wrangler, F-150, and import turbo platforms. Every product is filterable by inlet and outlet diameter, body size, overall length, and vehicle year, make, and model so the correct fitment ships the first time. Black Ops Auto Works carries 496 muffler and resonator SKUs across universal and direct-fit applications. What This Category Covers Mufflers and resonators are the sound-shaping heart of any exhaust system. A muffler controls overall volume and tone at the tailpipe, while a resonator upstream tames specific drone frequencies before they reach the cabin. Builders mix and match the two to dial in a sound profile that fits daily driving or track use. Muffler Types Chambered mufflers u...
View Mufflers & Resonators Products