TODOROKI™ VALVE RS Made-to-Order Equal-Length Z-Pipe Cat-Back Valved Exhaust｜BMW M3 G80/G81 / M4 G82/G83 / M2 G87 (S58)

The S58 is a 3.0-litre twin-turbo straight-six, generating thick torque from low revs. The factory exhaust, though, deliberately suppresses sound pressure with an OPF and silencers. Accelerate and nothing follows. That first sense of something missing in a G80, G81, G82, G83 or G87 comes from the exhaust, not the engine.

TODOROKI™ VALVE RSEqual-length Z-pipe Mid-pipe paired with an electronically controlled valve. Close it and the car is as quiet as factory; open it and the S58 gets back the top-end reach and the crack it always had.Choose the mid-pipe from 6 configurations. Even for the same car and the same budget, the ideal answer differs between someone mindful of their neighbourhood and someone taking the car to a circuit. We built in the ability to choose.

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

Z-pipe, equal-length mid-pipe, valved exhaust. An exhaust for the BMW M3 G80/G81, M4 G82/G83 and M2 G87 that has all three at once is, among aftermarket products in Japan, This is a first-of-its-kind configuration.

Only mid-pipe type "1. Two mid resonators + one large resonator" has no Z-pipe.

Each individual element exists elsewhere. Some products have a valved exhaust, and others advertise an equal-length design. However,As far as we could find, no product achieves all three at once. The structure is explained below.

As of July 2026, BIMMER+ research (covering aftermarket products for the G80, G81, G82, G83 and G87 available in Japan).

The mid-pipe type is"2. Z-pipe + large resonator" is standard. A Z-pipe delivers flow and torque together while a large-volume resonator pulls out low-frequency drone. Restrained in everyday use; open the valve and it sings.If you're unsure which to choose, this configuration is a safe choice.

Absolute quiet through residential streets, or maximum flow on track. If you have a clear objective in mind, choose from the comparison table below. Tip finish has no effect on the note, so pick whichever you prefer.

The mid-pipe on the TODOROKI™ VALVE RS cross-connects the left and right exhaust pathsZ-pipe sits at the centre of the design. The instant one side exhausts, that flow creates a depression inside the pipe. Cross the two sides and the depression pulls gas out of the other bank. That is the scavenging effect.

Unlike simply enlarging the pipe diameter to gain flow,you can extend high-rpm flow without losing low- and mid-range torqueThis is the essence of the Z-pipe. The extra thickness in the low end that comes from momentarily merging the left and right exhaust streams is a by-product unique to this design.

And with TODOROKI™, this Z-pipeEqual-length Mid-pipe. If the Z-pipe is the structure that connects left to right, equal-length is the design that aligns when each side's gas reaches the junction. Unequal path lengths put the exhaust pulses out of phase, and scavenging will not work as intended however you cross them. Equally, matching the lengths alone achieves nothing if the two sides are never joined — there is nothing there to draw against.Equal-length and the Z-pipe are a combination that isn't complete with just one or the otheris the case. TODOROKI™ builds all 6 mid-pipe types with an equal-length design.

However, this structure does have a weakness.The better the flow, the more quietness is lost. The valved exhaust is what solves this issue.

• Valve closed: A quiet path that routes through the silencer. Suitable for driving through residential areas or starting the car early in the morning
• Valve open: The straight path opens up, letting the Z-pipe's scavenging effect work at its fullest

"Free-flowing exhaust" and "a quiet-running car" are normally a trade-off, but if the path itself can be switched, both can be achieved.Releasing the exhaust efficiency secured by the Z-pipe only when needed. This is the design philosophy behind the TODOROKI™ VALVE RS.

For those who want to take scavenging even further,A dual Z-pipe with the cross-connection points increased to two(mid-pipe type 6) is also available. Where a standard Z-pipe crosses the left and right exhaust flows once, the dual Zhaving it cross twice. Adding a second opportunity for the depression to draw against the opposite bank extends flow further still at high rpm. With no silencing element in the system, this is a choice aimed squarely at track use.

Five of the six mid-pipe configurations include a Z-pipe. Only "2 × medium resonator + large resonator" goes without one, prioritising silencing over scavenging (see the comparison table below).

• Equal-length pipe design: path lengths from the collector after the catalytic converter through to the left and right silencers are matched. Unequal lengths mean the two sides arrive out of step and the note muddies as revs rise. Matching them puts the exhaust pulses in phase and the sound stays clean to the top. TODOROKI™ builds all six mid-pipe configurations to an equal-length design
• Z-pipe: cross-connects the left and right paths. The depression created as one side exhausts is put to work by the other, producing a scavenging effect. Flow improves without the usual loss of mid-range torque, and the note gains body at the bottom end
• Resonator: a silencer that cancels specific frequencies. The greater the volume, the lower the frequencies it can suppress, so large units are effective against drone while medium and small ones tame the top end. Running several in series attenuates the sound in stages
• 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
• 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

The resonator volume and count, along with whether a Z-pipe is fitted, determine the balance between quietness and flow.All 6 types feature an equal-length design. Options 1-5 are the same price; only option 6, the dual Z-pipe, adds +¥30,000. The numbers correspond to the list in the product images.

You choose at the point of order. If you are unsure, tell us how the car is used — where it is parked, when you drive, whether it sees track time — and we will recommend a configuration.

Fitment accuracy on an exhaust is settled by the actual car, not by a drawing. The TODOROKI™ system for the G80, G81, G82, G83 and G87 is Designed from 3D scan data of an actual car's underbody. Factory hanger positions, floor geometry and clearance to the rear bumper aperture are all pinned down from measured values, so it fits without modifying the car.

Welding isFully TIG-welded at high temperature. Since the exhaust system is constantly subjected to both heat and vibration, the quality of the joints directly determines durability.

In the S58, two turbos each serve three cylinders. Gas that has passed through a turbine has already given up pressure and energy, so what happens downstream determines a great deal about how the car sounds. That is precisely why the mid-pipe configuration becomes the character of the note.

A straight-six also fires at even intervals, so first- and second-order vibrations cancel each other naturally. Raising sound pressure without disturbing that smoothness is the single biggest reason to pair a free-flowing exhaust with a straight-six.

Plenty of owners move up the range on the same car. If changing the note is the priority, start with REAR; if you want the final form, go to TITANIUM. Choose by what you are after.

The RS is a grade designed around the principle of not compromising on price, quality, or sound.The silencer body features the TODOROKI™ logo. If we are going to carry a name, it goes on every single system regardless of price point. Costs unrelated to how the car drives or sounds are not loaded on; that money goes into material, construction and the price.

Focusing exclusively on BMW lets us share jigs and validation processes, and reading which chassis actually sell removes the waste of small-batch production. Tightening every stage — administration, manufacturing and shipping — is how we offer six mid-pipe configurations at this price.

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. Mid-pipe Configuration
   • Choose from 6 options (see the comparison table above)
2. Tip finish
   • Choose from 7 options (the numbers correspond to the list in the product images)
3. Tip (exhaust tip) diameter
4. Exhaust Body Wall Thickness / Pipe Diameter
5. Valve control method
   • Remote-controlled (standard)
   • If you'd like it changed to link with the factory valve, please contact us

• Body Material: SUS304 stainless steel
• Mid-pipe: Equal-length design. Z-pipe + large-capacity resonator (standard choice, changeable)
• Valve mechanism: Electronically controlled valve (remote-operated)
• 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 (Your Selected Configuration)
• Rear Silencer
• Bolt-on exhaust tip (tip)
• 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 M3 G80 / G81 / M4 G82 / G83 / M2 G87 (S58)Purpose-built design.

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.

This productDoes not support OPF sensor installation. On cars fitted with an OPF (petrol particulate filter) sensor, the sensor cannot be relocated, so a warning light may appear.

If you want to retain the factory OPF sensor,The TODOROKI™ VALVE S, which supports sensor installation please consider it. It's the same valved cat-back, and machining for the sensor mounting hole can also be arranged.

The OPF is an emissions device introduced with the G-chassis generation. Whether one is fitted depends on market, model year and trim, so if you are unsure whether your car has an OPF sensor, please ask before ordering.

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.