Deep Tone Industries BMW F97 X3M & F98 X4M Pre-LCI Wide Single Midpipe (2019-2021)

The DeepTone Industries wide single midpipe for the BMW F97 X3M and F98 X4M (Pre-LCI) is built around one of the most established and effective mid-section layouts available for the S58 platform. This classic design focuses on the centre of the exhaust system — the section that defines overall character — delivering strong flow capability alongside a deeper, more cohesive exhaust tone.

By merging both exhaust banks into a wider, centralised flow path, this midpipe improves exhaust gas velocity and pressure stability through the middle of the system. The result is a smoother, more consistent response under load and a sound profile that feels purposeful and controlled. At cruising speeds, the exhaust remains composed; when driven harder, it opens up with greater depth and clarity rather than sharp or metallic noise.

This proven wide single midpipe layout has long been favoured on high-output builds thanks to its ability to maintain reliable flow at significant power levels. On the F97 and F98 platforms, it provides a well-judged balance between everyday usability and serious performance headroom, making it an ideal foundation whether paired with the factory rear silencer or an aftermarket back box.

How a Wide Single Midpipe Affects Tone and Flow

Single midpipe designs are known for smoothing exhaust behaviour by stabilising pressure waves and reducing turbulence. The wider diameter used in this configuration further supports consistent gas flow as power levels increase.

In real-world driving, this translates to a deeper, more unified exhaust note with improved coherence across the rev range. The sound develops progressively, maintaining control at low loads while gaining presence under acceleration. It’s a design that prioritises balance and consistency, rather than chasing outright volume.

With proven capability on four-figure power applications, this midpipe is well suited to owners planning future upgrades while still wanting a refined, usable exhaust setup for daily driving and fast road use.

Key Features

• Proven wide single midpipe design for BMW F97 X3M & F98 X4M

• Improves exhaust gas flow consistency and pressure stability

• Delivers a deeper, more cohesive and controlled exhaust tone

• Smooths sound behaviour across the rev range

• Suitable for high-output applications, including four-figure power builds

• Designed for daily driving and spirited road use

• Compatible with factory or aftermarket rear silencers

• Supplied with a 1 Year DeepTone Industries warranty

Compatibility

• BMW F97 X3M (2019–2021, Pre-LCI)

• BMW F98 X4M (2019–2021, Pre-LCI)

• 3.0-litre S58 twin-turbo inline-six engines

Why Choose DeepTone Industries?

DeepTone Industries specialises in the part of the exhaust system that defines how a car sounds and feels. By focusing exclusively on downpipes and midpipes, DeepTone delivers proven exhaust layouts that improve tone and flow without unnecessary redesigns or inflated costs. These designs are refined through real-world use and backed by a 1 Year warranty for the original owner, offering confidence alongside strong value. It’s a measured approach for drivers who care about depth, balance, and consistency rather than noise alone.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.