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Official stockist · R44 Performance
Deep Tone makes the middle of the exhaust: the downpipes and midpipes that define tone, unlock flow and shape how your BMW feels every time you drive it. Proven layouts, refined over years of real-world use, at a price that makes sense.
Turbo to tip
An exhaust is a chain of parts, and they don't all do the same job. Most of the character comes from the middle: the downpipes and midpipes between the turbos and the valved rear section. That's the only part Deep Tone makes.
Merge the exhaust banks earlier and control the frequencies there, and the whole system sounds deeper and more cohesive, even through a factory back box.
Every Deep Tone part is an established layout with years of real-world use behind it. You're buying a system that's already been proven.
No unnecessary redesign costs and no branding tax. Stainless steel construction, smooth radius bends and accurate fitment, at a price that makes sense.
The rear section is the finish. The tips are the jewellery. Deep Tone is the core of the sound.
Choosing your part
Every Deep Tone part answers four questions: which part of the exhaust it improves, how it changes the tone, how it changes the flow, and who it's for.
Downpipes bolt straight onto the turbos. They have the biggest effect on flow, spool and how much turbo character you hear.
Midpipes replace the centre section, between the downpipes and the rear silencer. This is where the tone is shaped. In the UK, check a midpipe is legal for road use on your car before you buy (see the FAQ below).
Fitment
Every Deep Tone part we stock, grouped by car. Tap a part for full fitment details and pricing.
Not sure which suits your car? Tell our sales team your model and your current exhaust and we'll help you choose: sales@r44performance.com, WhatsApp UK +44 7723 579004 or USA +1 928 764 8822.
As seen on MSB's G87
Automotive content creator Michael Schublacker (MSB) had a Deep Tone Industries x Toroing Equal Length Z Pipe fitted to his G87 M2. The Z Pipe has quickly become one of the most sought-after upgrades for the S58.
What customers say
“Excellent quality, thanks.”
“It sounds really good.”
“Best company to deal with. Purchases arrive so quickly it's unbelievable.”
Questions, answered
Deep Tone Industries is a UK exhaust brand that makes the middle of the exhaust system for performance BMWs: downpipes and midpipes, turbo to valves. It focuses on proven exhaust layouts, refined over years of real-world use and offered at a price that represents real value. R44 Performance is an official stockist and ships Deep Tone worldwide.
No. Deep Tone makes downpipes and midpipes only. You can keep your factory rear silencer or pair Deep Tone with your favourite aftermarket rear section. Deep Tone is the foundation of the sound; the rear section is the finish.
Deep Tone is designed for tone, not noise. Merging the exhaust banks in the centre section gives a deeper, more cohesive note that stays composed at cruising speed and opens up with depth under load. Choose a resonated midpipe for the most refinement on a daily driver, or a wide single midpipe for more presence.
The downpipe is the first section after the turbo and has the biggest effect on flow and turbo spool. The midpipe is the centre section between the downpipes and the rear silencer, and it's where most of the tone is shaped. You can fit either on its own, or both together.
Catless downpipes remove the factory catalysts for maximum flow and character, and are sold for motorsport use only. 200 cell sports cat downpipes keep high-flow catalysts for better flow and faster spool with more refinement. Our S58 catless downpipes are also available in a no-CEL version, supplied with a CAN MIL module so no check engine light is shown.
Catless and sports cat downpipes are usually run with suitable engine software, and removing the factory catalysts can bring on the engine warning light. If you're not planning to code it out, choose the no-CEL S58 version. If you're unsure what your car needs, ask our sales team before you order.
Catless downpipes are sold for motorsport use only. They don't meet road emissions regulations and will fail a UK MOT. For sports cat downpipes, check the regulations where you live before using them on the road.
In the UK, a midpipe is not legal for road use if it removes a secondary catalytic converter or petrol particulate filter, or if it breaches noise regulations. On US vehicles this matters less, as US-market G8X cars don't have petrol particulate filters.
You are responsible for making sure a product is legal for your intended use before you buy. Read our off-road and EPA disclaimer.
It's a midpipe for the S58-powered G80/G81 M3, G82/G83 M4 and G87 M2, developed by Deep Tone Industries with Toroing. A 3D-printed stainless steel Z crossover and an equal-length layout balance exhaust pulse timing. That takes away the rasp many owners find in the factory exhaust, leaving a deeper, smoother, more exotic tone with more turbo whistle. It keeps your factory rear silencer.
Current fitments include the G87 M2, F87 M2 Competition, G80/G81 M3, F80 M3, G82/G83 M4, F82/F83 M4, G90/G99 M5, and the pre-LCI F97 X3M and F98 X4M, plus B58 and B48 models such as the M140i, M240i, 340i, 440i and 540i. The fitment list on this page shows the exact parts for each car.
Deep Tone downpipes are hand-built from TIG-welded 304-grade stainless steel, with CNC-machined billet stainless flanges and smooth radius bends. Midpipes are stainless steel, with a titanium option for the F97 X3M and F98 X4M, and the Z Pipe uses a 3D-printed stainless steel crossover.
Every Deep Tone part comes with a 1-year warranty for the original owner, plus a fitment guarantee.
Yes. Deep Tone parts are shipped worldwide, with express delivery available. Parts marked in stock on this page are on our shelf and ready to dispatch. Customers in the USA and Canada see prices in USD.
Deep Tone Industries makes the part of the exhaust that defines how a BMW sounds, feels and flows: the downpipes and midpipes between the turbos and the rear silencer. Rather than selling a full system, Deep Tone focuses on that middle section and builds it around proven exhaust layouts, so you get a deeper, more controlled tone and better flow without replacing everything or overspending.
Most of an exhaust's character is set in the centre section. On twin-turbo engines such as the BMW S58, the factory dual midpipe lets exhaust pulses merge unevenly, which many owners hear as a thin, metallic rasp. A single or equal-length midpipe merges the two banks earlier and more evenly, giving a deeper and more cohesive note. Downpipes sit directly after the turbos, so they have the biggest effect on flow, spool and throttle response.
Deep Tone works with your factory rear silencer, or with any aftermarket rear section you already like, so you only replace the part that changes the sound. That's where the value comes from: established designs, years of real-world use, no unnecessary redesign costs and no branding tax.
Catless downpipes are sold for motorsport use only. In the UK, a midpipe is not legal for road use if it removes a secondary catalytic converter or petrol particulate filter, or if it breaches noise regulations; US-market G8X cars don't have petrol particulate filters, so this matters less there. You are responsible for making sure a product is legal for your intended use before you buy. See our off-road and EPA disclaimer for more information.
R44 Performance is a UK-based BMW performance specialist and an official stockist of Deep Tone Industries. We ship worldwide, every part carries a 1-year warranty for the original owner and a fitment guarantee, and our sales team can help you choose the right setup for your car.
