Introducing an extraordinary 2025 BMW M4 CS finished in the highly sought-after BMW Individual Riviera Blue over Full Merino Anthracite Leather. With an original MSRP of $129,175, this M4 CS has been transformed into a truly one-of-a-kind, professionally built performance machine that combines exotic styling, track-ready handling, and supercar-level power. This meticulously modified M4 CS features a premium selection of performance upgrades designed to maximize both power and drivability. At the heart of this build is a custom M-Tech Flex Fuel Tune, allowing the vehicle to seamlessly operate on 93 Octane or E85 blends, producing an astonishing 800 Wheel Horsepower on E85. Supporting modifications include M-Tech High-Flow Downpipes, M-Tech Front Intakes and Filters, M-Tech Resonated Single Mid-Pipe, Port Injection Controller, M-Tech Fuel & Line System, and an M-Tech DIY LPFP Upgrade Kit, creating a complete fuel and airflow package engineered for serious performance enthusiasts. The driving experience is further enhanced with an XHP Transmission Flash and Bootmod3 WiFi Adapter, delivering sharper shifts, improved responsiveness, and custom tuning capabilities. The result is a brutally fast M4 CS with a deep, aggressive exhaust note that commands attention at idle and under full acceleration. Visually, this M4 CS stands apart from anything else on the road. A KW Height Adjustable Spring Kit provides the perfect stance while maintaining exceptional handling characteristics. Completing the exterior is a stunning set of brand-new Edelweiss LT3 Wheels, perfectly complementing the Riviera Blue paint and aggressive factory M Carbon Exterior Package. Performance Upgrades: Custom M-Tech Flex Fuel Tune 800 WHP on E85 Flex Fuel Ready (93 Octane to E85 Blend) M-Tech Front Intakes and Filters M-Tech High-Flow Downpipes M-Tech Resonated Single Mid-Pipe Port Injection Controller M-Tech Fuel & Line System M-Tech DIY Low-Pressure Fuel Pump Upgrade Kit XHP Transmission Flash Bootmod3 WiFi Adapter Suspension & Appearance: KW Height Adjustable Spring Kit New Edelweiss LT3 Wheels BMW Individual Riviera Blue Paint M Carbon Exterior Package M Carbon Bucket Seats Shadowline Exterior Trim Yellow M Performance Headlights Factory Highlights: Adaptive M Suspension M Sport Differential M Drive Professional M Driver's Package M Compound Brakes with Red Calipers BMW Curved Display with Head-Up Display Harman Kardon Surround Sound System Apple CarPlay® & Android Auto Heated Front Seats Wireless Charging Active Driving Assistant Comfort Access Keyless Entry This is not your average M4 CS. It is a professionally built, flex-fuel monster capable of producing over 800 wheel horsepower, while retaining the refinement, technology, and exclusivity expected from BMW's most coveted performance models. With its aggressive stance, incredible sound, premium modifications, and rare Riviera Blue finish, this M4 CS offers a level of performance and uniqueness rarely found on the market. If you're looking for a turnkey, professionally built BMW that delivers exotic-car performance with everyday drivability, this one-of-a-kind M4 CS deserves a place at the top of your list.