$595.00 USD
$595.00 USD






























































































For those who demand an unrivaled exhaust experience from their BMW X3M or X4M, Valvetronic Designs has created a system that blends precision engineering, raw emotion, and absolute control. Built with a deep understanding of the BMW M community, this exhaust not only boosts performance but also transforms the character of the S58 engine—delivering a visceral and exhilarating sound every time you drive.
The raw, unfiltered S58 experience. This design enhances the factory sound characteristics while unlocking a deeper, more aggressive tone. Expect:
Enhanced clarity and volume
Punchy, M-car exhaust note
Improved flow and responsiveness
Perfect for drivers who want their X3M/X4M to make a bold statement with every start-up and wide-open throttle pull.
For those seeking something truly special, our equal-length resonated configuration delivers a refined, exotic tone. By balancing exhaust pulses, this system eliminates uneven frequencies, producing a smooth, motorsport-inspired sound reminiscent of high-end European supercars. Ideal for enthusiasts who want both performance and a unique acoustic signature.
Factory-Integrated Valves: Electronic valves tie directly into the OEM M1/M2 drive modes for instant sound control.
Independent Control Option: Included standalone controller for complete manual control of your exhaust valves.
Material Options:
T304 Stainless Steel – Extreme durability, resistance to corrosion, and a rich tone.
Grade 5 Titanium – Ultra-lightweight, sharper tone, and superior heat resistance.
True Cat-Back Performance: Complete replacement of the factory cat-back for measurable gains in power, throttle response, and overall sound dynamics.
We don’t just build exhaust systems—we create driving experiences. Every product we engineer is the result of relentless R&D, with a single mission: to give enthusiasts the ultimate sound, performance, and quality.
Whether you choose the ferocious Single Mid-Pipe System or the supercar-like Equal-Length Resonated System, you’ll be rewarded with an unparalleled auditory experience—turning every drive into an event.
BMW F97 X3M (2019–Present)
BMW F98 X4M (2019–Present)
Constructed from T304 Stainless Steel or Grade 5 Titanium
OEM valve integration with optional independent controller
Equal-length or single mid-pipe configurations
Fully mandrel bent for maximum flow
Precision TIG welds for strength and durability
100% reversible—return to stock at any time
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$595.00 USD
$595.00 USD
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
For a complete list of chemicals known to cause harm, visit https://www.p65warnings.ca.gov/chemicals.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell, install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB), it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.
All performance, racing, or competition parts sold by this company are intended solely for off-road, closed-course, or competition use on vehicles that are never registered or used on public highways.
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the use of emission-control defeat devices or any modification that violates the Clean Air Act or state regulations.