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G-Power

G-Power is a car tuning manufacturer based in , . Founded in 1983 by Jochen Grommisch, the company specializes in performance upgrades for automobiles and the production of boutique high-performance vehicles, including its Hurricane series. G-Power also offers tuning solutions for other luxury brands such as , , and Ferrari, emphasizing engineering for increased power, handling, and customization.

History

Founding and Early Years

The origins of G-Power trace back to 1971, when the Grommisch family began operations in near , , initially focusing on performance refinements for vehicles. This informal start laid the groundwork for the company's expertise in enhancing models through custom modifications. In 1973, the family expanded their involvement by acquiring the distribution rights for products in the Rhine/Main area, which introduced them to high-performance tuning and distribution, further solidifying their position in the . The formal establishment of G-Power GmbH occurred in 1983, founded by Jochen Grommisch in , , marking a dedicated shift toward specialized tuning operations. Relocating from , the company concentrated on developing performance upgrades, including DTM-inspired rear silencers and wedge-shaped chassis setups equipped with Koni suspension components. This move allowed G-Power to transition from general vehicle refinement and distribution to in-house for enthusiasts, emphasizing reliability and power gains. In its early years, G-Power prioritized engine enhancements and kits tailored for iconic models such as the E30 and E34 series, alongside broader efforts for the 3-Series lineup. These developments, beginning around with proprietary products, showcased the company's innovative approach to boosting horsepower while maintaining drivability, setting the stage for future expansions into more diverse vehicle modifications.

Expansion and Key Milestones

During the 1990s, the company entered limited-series production of performance-tuned models, including enhanced versions of the 5-Series (E34) and 7-Series (E38) equipped with kits that boosted outputs to over 400 hp. In 1995, Zoran Zorneke acquired the business operations and trademark rights, overseeing subsequent developments. The company relocated to Brunsbüttel in 1997 and returned to in 2007, enabling scaled production of tuning components and vehicles. The early 2000s marked the launch of the Hurricane branding in 2002 under Zorneke's leadership, introducing a dedicated line of extreme performance vehicles, beginning with the G3M CSL based on the E46 featuring a 5.0L producing 530 hp. Beginning in the , G-Power diversified its portfolio beyond , offering tuning programs for models like the 2016 AMG GT S upgraded to 610 hp via remapping and exhaust modifications, as well as performance enhancements for , , , and vehicles. A key milestone in the included the continued evolution of the Hurricane series, exemplified by the 2020 G5M Hurricane RR based on the F90 with 900 hp from its 4.4L V8 bi-turbo engine, alongside broader tuning expansions for non-BMW models such as the tuned to 780 hp in 2022; by 2025, G-Power had operated for over 40 years, focusing on high-performance engineering rooted in the Grommisch family's early involvement.

Company Operations

Headquarters and Facilities

G-Power's headquarters are situated in Gachenbach, a small municipality in the Aichach-Friedberg district of , , where the region's established automotive heritage supports specialized engineering and tuning operations. The company originally began operations in Neu-Isenburg near before relocating to its current Bavarian base. The primary , known as Headquarter II, is a state-of-the-art competence center that opened in 2024 and covers 3,000 square meters. It features modern workshop halls dedicated to , a performance testing area equipped with two MAHA dynamometers for dyno testing, and assembly spaces tailored for producing one-off customizations and small-series vehicles. Complementing this is Headquarter I, integrated with service infrastructure, which handles the full range of G-Power products alongside routine BMW maintenance and repairs in a built to BMW's standards. In-house capabilities at the Gachenbach site include research and development labs focused on and performance enhancements, enabling the creation of proprietary systems and other upgrades. Quality control processes are integral to operations, ensuring all modifications meet rigorous safety certifications for road legality in and beyond. The workforce consists of specialized engineers, mechanics, and designers with deep expertise in vehicle architecture, supporting the company's emphasis on precision tuning.

Global Reach and Partnerships

G-Power maintains a robust international distribution network, with qualified retailers and service centers operating in over 20 countries across , , and Asia. This global footprint has expanded progressively since the early , enabling customers worldwide to access the company's upgrades and customization services through authorized partners. In , authorized dealers are established in nations including , , , , , , , and , while in , G-Power USA in serves as a key hub for the U.S. market. Asian presence includes dealers in , , , and , supporting the brand's growing demand in high-performance automotive regions. The company fosters strategic partnerships with leading automakers and suppliers to ensure compatibility and quality in its solutions. G-Power specializes in enhancements for vehicles, leveraging close collaboration with the brand to develop validated performance modifications that maintain engineering integrity. Additionally, it partners with premium suppliers such as for high-performance tires, as seen in custom projects featuring specialized rubber compounds for enhanced grip and handling. These alliances allow G-Power to integrate top-tier components seamlessly into its offerings. Beyond , G-Power extends its expertise to luxury brands through collaborations with and Ferrari dealers, providing co-branded tuning kits and upgrades since the mid-2010s. These joint efforts focus on power enhancements and aerodynamic refinements for models from these marques, appealing to enthusiasts seeking modifications. The company's export-oriented operations ship a majority of its production internationally, catering to diverse markets with tailored solutions. Complementing this reach, G-Power launched an online configurator in the late 2010s, allowing global users to preview and customize upgrades digitally before purchase.

Tuning Philosophy

Engineering Approach

G-Power's engineering approach centers on delivering "first-class performance" through meticulous, detail-oriented modifications that elevate vehicle power while preserving drivability, safety, and overall reliability—a philosophy upheld since the company's in 1983. This commitment stems from a passion for and dependability, ensuring that every upgrade enhances the driving experience without introducing instability or excessive wear. Central to this methodology is a holistic strategy that integrates advancements across multiple systems, including the , , brakes, and , to create balanced performance improvements rather than isolated, bolt-on enhancements. By treating the automobile as an interconnected whole, G-Power avoids compromises in handling or longevity, allowing high-power configurations to remain suitable for everyday road use. The development process employs iterative testing cycles, encompassing extensive on dynamometers, real-world road endurance evaluations, and professional test drives to refine modifications for optimal results. These phases culminate in adherence to rigorous German quality and safety standards, with many components and kits certified by for legal road approval and proven performance on high-speed environments like the . Driving innovation is the demand for reliable, daily-drivable capable of surpassing horsepower, where emphasis is placed on sustained reliability over mere peak speed. Quality is maintained through the use of premium materials, such as aerospace-grade 6061 aluminum for forged wheels and carbon fiber for aerodynamic and structural elements, ensuring strength and durability. This approach is evident in series like the Hurricane models, where balanced engineering delivers supercar-level power with practical usability.

Core Technologies

G-Power's systems represent a of their performance enhancements, particularly for naturally aspirated V8 engines. The company collaborates with to develop centrifugal superchargers, such as the SK II series, which integrate directly with the engine's belt drive for minimal turbo lag and seamless power delivery. These systems have been applied to models like the E92 M3, boosting the S65 V8 from 414 to up to 720 while maintaining reliability through reinforced internals and optimized cooling. In chassis enhancements, G-Power employs custom suspension kits featuring adjustable coilover systems with independent compression and rebound damping. These kits, like the Clubsport setup, lower ride height by 20-50 mm and allow for precise tuning to balance street comfort and track performance, significantly improving cornering stability and reducing body roll. Such modifications enhance lateral grip without compromising daily drivability, as demonstrated in their applications for the 1 Series and M3 models. Braking technology from G-Power includes upgraded systems sourced from premium suppliers like , often incorporating larger rotors and multi-piston calipers for superior heat dissipation and . These enhancements enable repeated high-speed stops from over , with fade-resistant performance critical for high-output . Aerodynamic developments focus on CFD-optimized body kits made from carbon fiber, which generate additional for better high-speed stability. Components such as front splitters, side skirts, and rear diffusers on models like the M4 contribute to top speeds exceeding without limitation. Electronics tuning at G-Power centers on ECU remapping and software optimizations, tailored for both traditional internal combustion s and modern powertrains to maximize output while adhering to emissions standards. For example, their bi-turbo upgrades for the S58 in the G82 M4 achieve 700 through refined fuel mapping and boost control. This approach extends to models, such as the , where tuning yields up to 950 as of 2025 while preserving reliability.

Products and Services

Performance Upgrades

G-Power specializes in performance upgrades that target the engine, drivetrain, and related systems of vehicles, with a particular emphasis on the S63 V8 bi-turbo engine found in models like the M5 and M8. These modifications are engineered as standalone components or integrated packages to deliver substantial power gains while maintaining reliability and drivability. The company's approach prioritizes bolt-on solutions that leverage the S63's inherent potential, often combining hardware revisions with for optimized performance. Central to G-Power's offerings are bi-turbo engine kits for the S63 V8, which elevate output from the stock 600 horsepower to over 800 horsepower through upgraded turbochargers, enhanced intercoolers, and revised exhaust systems. For instance, the GP-900 turbocharger upgrade replaces OEM units with larger compressors and turbines designed for higher boost pressures and increased air mass flow, achieving 800 to 900 horsepower and supporting torque figures up to 1,050 Nm. Similarly, the GP-800 kit for earlier S63 variants, such as in the F10 M5, boosts power to around 800 horsepower via optimized turbo mapping and downpipe modifications. These kits include supporting components like high-performance intercoolers to manage heat and ensure consistent power delivery under high loads. In 2025, G-Power introduced upgrades for the BMW M5 G90, boosting output to 900 horsepower and 1,000 Nm of torque through ECU tuning and exhaust modifications. Transmission enhancements from G-Power reinforce the ZF 8-speed automatic gearbox to withstand extreme , rated for up to 1,000 in applications like the series for S63-equipped SUVs. These upgrades involve strengthened internals, improved cooling, and software calibrations that enhance shift speeds and paddle-shift responsiveness, preventing slippage during aggressive acceleration. In high-output configurations, such as those exceeding 800 , the reinforced ensures seamless transfer without compromising the unit's longevity. Drivetrain modifications emphasize all-wheel-drive systems with torque vectoring optimizations, particularly for xDrive-equipped models like the M5, resulting in 0-100 km/h times under 3 seconds. G-Power's packages recalibrate the electronic distribution to prioritize rear-biased dynamics while improving traction off the line, often paired with upgraded differentials for better handling under high power. These changes contribute to sub-3-second sprints in tuned S63 applications, as seen in configurations delivering 840 horsepower. Pricing for G-Power's performance upgrades varies by scope; a basic turbocharger kit starts at around €10,000, while comprehensive packages including , , and modifications exceed €50,000 as of 2025. These costs reflect custom engineering and dyno-tested validation, with full kits like the Hurricane RS upgrade for the M5 priced at €59,900 for 840 horsepower output. Such investments can integrate briefly with aesthetic customizations for a cohesive build, though performance remains the core focus.

Customization and Accessories

G-Power provides a variety of exterior customization options centered on aerodynamic enhancements, featuring carbon fiber aero kits that include front splitters, side skirts, rear diffusers, and spoilers. These components are crafted from high-quality carbon fiber with a motorsport-inspired design to improve aesthetics and , and they are available in gloss or matte finishes for personalized styling. The company offers wheel and tire packages designed to complement vehicle performance and appearance, including forged 21- to 22-inch alloy wheels in styles such as the Hurricane RR, constructed from aerospace-grade 6061 aluminum for durability and lightness. These are typically paired with Pilot Sport tires rated for high speeds, resulting in a reduction of unsprung weight by approximately 5-10 kg per set compared to standard OEM wheels, which enhances and handling. Interior customizations from G-Power emphasize premium materials and branding, with options for Alcantara and fine upgrades throughout the cabin, including seats, , and trim elements. These often incorporate embroidered G-Power logos for a distinctive touch, creating a monochromatic or coordinated look tailored to the vehicle's exterior theme. Among G-Power's accessories, exhaust systems stand out for their integration of active valves, enabling drivers to adjust sound levels from subtle to aggressive via flap control, while maintaining compatibility with performance kits. The company also provides protective elements like films for high-wear areas to preserve the vehicle's finish during daily use. Since , G-Power has utilized an online configurator platform that allows customers to virtually preview and build personalized vehicle configurations, selecting from available exterior, , interior, and accessory options. Custom orders configured through this typically have delivery times of 4-8 weeks, depending on complexity and availability.

Notable Achievements

Signature Models

G-Power's Hurricane series represents the company's flagship line of limited-edition performance vehicles, embodying their expertise in transforming models into extreme high-output machines. Introduced in its modern bi-turbo form in 2020, the series focuses on the , enhanced through advanced remapping, upgraded turbochargers, intercoolers, and exhaust systems to deliver unprecedented power while maintaining drivability. These models are hand-built in small series at G-Power's facility in , , with bespoke numbering on each unit to ensure exclusivity. The G5M Hurricane RR, based on the (F90), stands as a pinnacle of with a supercharged-equivalent bi-turbo V8 producing 900 (663 kW) and 1,050 Nm of . This setup enables a top speed exceeding 340 km/h, surpassing the stock M5's capabilities by a significant margin, while acceleration from 0-100 km/h occurs in under 3 seconds. The model incorporates a full aerodynamic kit, including carbon fiber elements for reduced weight and improved , along with 21-inch Hurricane RR forged wheels. The upgrade package starts at €119,000 (including 19% ), bringing the complete vehicle's price to approximately €300,000 as of 2025 when added to the base M5. Complementing the sedan, the G8M Hurricane RR variant draws from the Competition (F92), elevating its 4.4-liter V8 to 900 and 1,050 through similar bi-turbo optimizations. It achieves 0-100 km/h in 2.9 seconds and a top speed over 340 km/h, enhanced by a widebody kit that widens the track by 10 cm, a carbon roof for better weight distribution, and upgraded braking with 400 mm discs. Production follows the small-series approach in , emphasizing hand-assembly for precision. Pricing for the RR package begins at €119,000, resulting in a fully built model exceeding €300,000 in 2025. The G8M Hurricane RS offers a slightly detuned version at 840 (618 kW) starting from €59,500. While the core Hurricane lineup centers on BMW platforms, G-Power has extended similar high-performance philosophies to non-BMW vehicles since 2022, including Porsche 911 (992) variants boosted to over 800 hp with GP-800 software. These adaptations maintain the series' emphasis on limited production and bespoke construction.

Records and Recognition

G-Power gained significant recognition in the automotive tuning world with the M5 Hurricane RR, which set a top speed record of 372 km/h (231 mph) in 2010, establishing it as the fastest road-legal four-door sedan at the time. This feat was achieved through a twin-supercharged 5.0-liter V10 engine producing 800 horsepower and 590 lb-ft of torque, with the speed verified via GPS measurements during independent testing on a closed course. The record underscored G-Power's engineering prowess, surpassing previous benchmarks set by its own Hurricane RS variant at 367.4 km/h earlier that year, and it was celebrated across international media for pushing the limits of production-based performance. Beyond speed records, G-Power has earned industry acclaim for its innovative approaches, particularly in enhancing models, with the Hurricane lineup inspiring advancements in high-output supercharging and within the tuning sector. The company's work has been extensively featured in publications like Auto Bild, which has tested and highlighted models such as the tuned Touring for its extreme power outputs exceeding 800 hp.

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