TODOROKI™ VALVE RS STRAIGHT Made-to-Order Single-Exit Valved Exhaust｜BMW M3 F80 / M4 F82/F83 (S55)

The S55 is a 3.0-litre twin-turbo straight-six — the M engine that preceded the S58, fitted to the M3 F80 and M4 F82. It combines a 7,600rpm limit with a rev-out that stays clean despite forced induction. 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 short. This is the source of the first disappointment most owners notice on the F80 / F82.

The TODOROKI™ VALVE RS STRAIGHT replaces everything downstream of the catalytic converter withSingle Exit on the Left. A straight-through mid-pipe routes gas by the shortest path, and an electronically controlled valve switches the volume.The rear-end look changes dramatically from the factory quad-exit setup.

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

The factory M3 F80 and M4 F82/F83 run four tips across the rear. TODOROKI™ VALVE RS STRAIGHT takes that and A configuration that consolidates into a single pipe on the left side.

Changing the number of tips is not simply a design change.the length of the exhaust path, the weight at the rear of the car, and the directionality of the sound all change. Where four tips spread the sound left and right, a single exit releases it from one point, so it sounds more concentrated.

The structure itself is straightforward too. With no splitting or merging between left and right,Exhaust gases exit the car via the shortest possible routeA configuration for those who want to prioritise flow above all, and who want a rear look different from factory.

This is a configuration people feel strongly about either way. If you want to keep the factory quad-exit look, consider TODOROKI™ VALVE RS with the equal-length mid-pipe at the same price.

The mid-pipe of the TODOROKI™ VALVE RS STRAIGHT isStraight-through constructionis such a path. It has no resonator and no bends, sending exhaust straight from the catalytic converter to the silencer.

In a configuration that narrows the exit to a single pipe, every branch and merge point directly adds resistance.Instead of splitting left and right, it runs the shortest distance through a single path. A single-exit design has a structural advantage here.

If pure exhaust efficiency is your only goal, this is the most rational configuration.however, since the mid-pipe has no sound-damping element, the volume stays constant at all timesis a weakness here — whether driving through a residential neighbourhood or starting the engine early in the morning, the volume never changes.

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 mid-pipe has no silencing structure by design, the difference between valve open and closed is larger.

This productElectronically controlled valve (remote-operated) as standard. If you'd like it changed to link with the factory valve, please contact us before purchase.

Whichever method you choose,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 silencer intact, so the system is far less likely to choke high in the rev range
• Silencer Internal Structure: packed with heat-resistant stainless wool and sound-absorbing fibre. Compared with ordinary glass wool it degrades far less under heat, so silencing performance holds up over the long term. The quiet you get with the valve closed rests on this internal structure
• Silencer: One unit is positioned on the left side. With the valve closed, exhaust routes through it for silencing; 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
• Single Exit on the Left: Consolidates the outlets into a single exit. This fundamentally changes the rear-end impression compared with the factory quad-exit layout
• 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

Fitment accuracy for an exhaust is determined by the actual car, not the drawings. For the TODOROKI™ F80 / F82 / F83 version,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.Because a single-exit layout differs greatly from the factory routing, this measurement accuracy directly determines whether it fits.

Welding isFully TIG-welded at high temperature. The base material is SUS304 stainless steel at a full 1.5mm wall thickness. An exhaust takes heat and vibration continuously, so the quality of every joint is the durability of the system.

In the S55, two turbos each serve three cylinders. Gas leaving the left and right banks passes through separate turbines before flowing downstream.How the exhaust processed separately on each side is finally brought together — this is what determines the sound. A straight-through configuration that consolidates into one pipe is the answer for those who prioritise flow above all else.

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. It draws out the S55's 7,600rpm ceiling in the one dimension the factory left on the table: sound. Reduce the system to a single exit and the note concentrates, giving it a directionality a quad-exit system never has.

Equal-length mid-pipe and STRAIGHTPriced the same. The difference is the number of exits and the mid-pipe structure. To keep the factory quad-exit look, choose the equal-length mid-pipe; to change the view from behind, choose STRAIGHT. TITANIUM is the full-titanium version of the equal-length mid-pipe.

STRAIGHT exists to change the view from behind. Reducing the system to a single exit divides opinion, but for those who choose it nothing else looks the same. Quality standards are identical to the higher grades.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
• Structure: Cat-back (full replacement from the catalytic converter back).Single Exit on the Left
• Mid-pipe: Straight construction
• Wall thickness: 1.5mm
• Inside the Silencer: heat-resistant stainless steel wire plus sound-absorbing fibre
• 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
• Silencer
• 1 tip
• Valve controller, remote, and wiring
• Band clamp set

We are publishing actual exhaust-note recordings progressively as they become available for each model. If you're in a hurry, please use the contact form to"Vehicle model and chassis" and "sound sample request"Please include this when you contact us. For models we already have a sound sample for, we'll send it as is; for models still in preparation,We prioritise preparation for vehicle models based on customer requests.

BMW M3 F80 / M4 F82 & F83 (S55)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.

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.