TODOROKI™ VALVE RS Made-to-Order Valved Exhaust｜BMW M240i G42 / M340i G20 / M440i G22/G23/G26 (B58)

The B58 is a 3.0-litre single-turbo straight-six — BMW's current mainstay engine, fitted to the M240i, M340i and M440i. It makes thick torque from low revs and spins cleanly all the way to the top. The factory exhaust, though, is designed to deliberately suppress sound pressure through its silencers.The engine has the character, but the exhaust note alone falls shortThe initial sense of something lacking that you notice with an M Performance model stems from this point.

TODOROKI™ VALVE RS replaces everything downstream of the catalytic converterQuad-exit cat-back system. A straight-through mid-pipe carries the exhaust by the shortest possible route, and an electronically controlled valve switches the volume.With the valve closed, refinement equal to factory; open, the straight-six's true pull and sound pressurerestoring it.

This productMade to orderThis is made to order. Once your order is confirmed, we build one unit exactly to your chosen specification.

The mid-pipe of the TODOROKI™ VALVE RS isStraight-through construction. With no resonator and no bends, it sends the exhaust straight from the catalytic converter to the centre silencer. The main pipe isØ89mm (3.5 in). The secondary pipe design differs by model,The M340i / M440i use Ø76mm (3 in.), and the M240i uses Ø70mm (2.75 in.). A pipe that is too large for the displacement slows flow velocity, so the optimal diameter is selected for each model.

If pure exhaust efficiency is your only goal, this is the most rational configuration.That said, straight construction has a clear drawback: with no silencing element, the volume stays the same at all timespoint. The volume doesn't change whether you're driving through a residential area or starting the car early in the morning.

The valved exhaust is what solves this.

• Valve closed: A quiet path that runs through the centre exhaust. Volume drops to near-factory levels, so it won't be an issue when driving in residential areas or starting the car early in the morning
• Valve open: The straight path opens up, maximising exhaust efficiency

Exhaust efficiency and quietness are normally a trade-off, but a design that switches the flow path itself lets you have both.Releasing the exhaust efficiency gained from the straight construction only when needed. Because the design has no silencing structure, the swing between valve open and closed is more pronounced.

This productSupports two methods: electronically controlled valve, or linkage with the factory valve. Please specify this at the time of order.

If you want it linked to the factory valve,Please be sure to let us know at the time of purchase. Specifications are locked in during production, so changes cannot be made afterward.

• Straight Mid-pipe: no resonators, no bends, no resistance. Gas velocity is carried through to the centre silencer intact, so the system is far less likely to choke high in the rev range
• Centre exhaust: A single silencer is positioned at the centre of the car. With the valve closed, exhaust routes through it for sound suppression; when open, it's bypassed
• Electronically controlled valve: switches the exhaust path just before the silencer. Closed, gas runs the quiet route through the silencer; open, it takes the straight path — so volume and character change together
• Quad-exit: Exhaust exits through four tips, two per side — a configuration that secures exhaust efficiency while giving the look befitting an M Performance model
• Cat-back Structure: The factory catalytic converter is left in place, replacing only the section downstream of it. As it uses the factory hanger positions, no modification to the vehicle is required

An exhaust pipe's performance is determined less by its straight sections than byis determined at the bendsWith ordinary bending, the inside of the pipe collapses, reducing the cross-sectional area at that point. Exhaust slows down there, creating resistance.

TODOROKI™ uses, across its entire length,Mandrel bends. We use mandrel bending — because the pipe is bent with a mandrel run through the inside,The cross-section stays perfectly round even at the bends. The exhaust efficiency gained from equal-length design and straight construction only comes together because of this process.

Welding isFully TIG-welded at high temperature. Joints are welded from both inside and out. An exhaust takes heat and vibration continuously, so the quality of every joint is the durability of the system.

The B58 runs a single turbo. Unlike the S58, which splits the cylinders between two, all six cylinders' worth of gas passes through one turbine before heading downstream.Because the exhaust is consolidated into a single pipe before being sent downstream, exhaust efficiency from that point on greatly shapes the character of the sound. This is where straight construction pays off.

A straight-six also fires at even intervals, so first- and second-order vibrations cancel each other naturally. Being able to raise sound pressure without touching that smoothness is the single biggest reason to pair a free-flowing exhaust with a straight-six. The B58 keeps its low-end torque intact and gains reach at the top.

The structure, valve mechanism, and vehicle fitment are all shared.The Only Difference is Material. If you value weight reduction, the change in sound, and the texture of heat-tint colouring that develops over time, consider the TITANIUM.

RS is a grade designed around one standard: no compromise on price, quality, or sound.The silencer body features the TODOROKI™ logo. If we are going to put our name on it, it goes on every product regardless of price point. Costs that contribute nothing to performance or sound are not carried; that money goes into material, construction and the price.

Focusing exclusively on BMW lets us share jigs and validation processes across products, and reading demand chassis by chassis removes the losses that come with small-batch production. Optimising every stage — administration, manufacturing and shipping — is what makes this price possible.

TODOROKI™ is made to order, one car's worth at a time, in partnership with our production facility. Fabrication begins once your order is confirmed, and BIMMER+ selects and inspects every specification before dispatch.

• Customization available on request: We're happy to discuss exhaust specifications with you before purchase
• Volume direction can also be specified: We can accommodate requests such as "more sound with the valve open" or "quieter with the valve closed"
• Additional Charges: Additional charges may apply depending on the specification
• Prior consultation required: If you'd like customisation, please be sure to contact us before purchase
• Notes: Some customisations may not be available depending on production status or vehicle model

1. Tip finish
   • Choose from 7 options (the numbers correspond to the list in the product images)
2. Tip (exhaust tip) diameter
3. Exhaust Body Wall Thickness / Pipe Diameter
4. Valve control method
   • Electronically controlled valve / remote-operated (standard)
   • Linked to the factory valve (please let us know at the time of purchase)

• Body Material: SUS304 stainless steel
• Wall thickness: 1.5mm
• Structure: Cat-back (replaces everything after the catalytic converter). 4 tips
• Mid-pipe: Straight construction
• Pipe diameter: main Ø89mm (3.5in) / secondary Ø76mm (3in) on the M340i and M440i, Ø70mm (2.75in) on the M240i
• Valve mechanism: Electronically controlled valve (remote-operated, standard) / factory valve linkage also available
• Welding: Fully TIG-welded
• Installation: Uses the factory hanger positions. A bolt-on design that requires no modification to the car
• Logo: TODOROKI™ logo on the silencer body

• Mid-pipe
• Centre exhaust
• Exhaust Tips (4 pieces)
• Valve controller, remote, and wiring
• Band clamp set

Watch the exhaust-note sample
Reference recording. Samples may use another model with the same engine family, exhaust grade and material. The exhaust note varies with the vehicle, pipe configuration, recording conditions and playback equipment.

BMW M240i G42 / M340i G20 / M440i G22, G23, G26 (B58)Purpose-built design.

Exclusively for M Performance models (B58-equipped).Not compatible with B48-equipped models such as the 330i / 430i / 220i, so please take note.

BIMMER+ organises its collections by chassis code. Search from your own chassis and only the parts that fit will appear. Model year, trim and prior modifications may mean some adjustment is needed at fitting, so please ask before you buy if anything is unclear.

The listed priceShipping, customs duties, and customs clearance fees are all included.There are no additional costs after the product arrives.

Exhausts are bulky and heavy, and shipping alone runs to around ¥20,000. Some sellers bill freight and domestic forwarding separately from the product price; BIMMER+ quotes one all-inclusive figure.

After your purchase, be sure to"Vehicle model / year / VIN" via our contact form. Even if you do not want any customisation, please still get in touch so we can identify your car.

Removing and fitting an exhaust requires specialist tools and a lift. We strongly recommend installation by a qualified workshop or specialist. Wiring for the valve controller is also involved, so if you are not confident about fitting it yourself, please use a professional.

On cars with a factory valve, removing it may trigger a warning light. If that happens, a canceller or similar solution will be required.

As these are built to order, shipping after order confirmation typically takes2–4 weeks. Customisation, production and logistics can push this beyond the stated period. If you are working to a deadline, talk to us before ordering.