$595.00 USD
$595.00 USD














































The BMW X7 M60i and Alpina XB7 deliver immense performance and luxury—but their factory exhaust holds back the soundtrack these SUVs deserve. The Valvetronic Designs Valved Cat-Back transforms the experience with a more raw, motorsport-inspired tone, sharper gearshift snaps, and an enhanced character throughout the rev range.
Connecting to OEM or aftermarket free-flow downpipes, this 2.75-inch system runs unrestricted from inlet to tip. In testing, we found that an unresonated design delivered the most engaging sound, producing pronounced pops and crackles when shifting, while maintaining a drone-free cabin with the valves closed.
The included electronic valve controller allows you to fully control the exhaust at any RPM, unlocking maximum enjoyment whether you’re cruising in comfort or pushing the M50i powertrain to its limits.
Unresonated Free-Flow Design: More aggressive tone and sharper gearshift sound.
2.75" Mandrel-Bent Tubing: Optimized flow for improved throttle response and performance.
Full Valve Control: Operate valves independently of factory settings for complete sound customization.
Valves Closed: Quiet, refined tone for comfortable daily driving and long-distance cruising.
Valves Open: Amplified volume, pronounced pops, and a motorsport-inspired note.
Included Controller: Allows full open/close functionality at any RPM.
Material: High-grade T304 stainless steel for strength and corrosion resistance.
Weight Savings: 14.7 lb lighter than OEM.
Craftsmanship: Precision TIG welds and mandrel bends for durability and flow efficiency.
Tips: Designed to retain OEM tips for a clean, factory-finish look.
BMW X7 M50/M60i
Alpina XB7
Direct bolt-on fitment to OEM or aftermarket downpipes.
100% reversible—return to stock at any time.
2.75" T304 stainless steel valved cat-back system
Electronic valve controller
All necessary clamps and hardware
Tubing Diameter: 2.75" from inlet to outlet
Material: T304 stainless steel
Valves: Electronic, rapid open/close with included controller
Weight Savings: 14.7 lb vs. OEM
Design: Unresonated, free-flow for maximum sound and performance
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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.