RENNtech
RENNtech is a privately-held American automotive performance tuning company founded in 1989, specializing exclusively in Mercedes-Benz and AMG vehicles through ECU tuning, turbocharger upgrades, custom builds, restoration, and certification services for high-net-worth enthusiasts and collectors.
- Company typePrivate
- Founded1989
- HeadquartersStuart, United States
- Headcount11–50
- GTM typeB2C
- OfferingHardware or Manufacturing
What RENNtech does
RENNtech, Inc. is a privately-held American automotive performance aftermarket company founded in 1989 by Hartmut Feyhl, the former Technical Director of AMG North America, and headquartered in Stuart, Florida. The company specializes exclusively in Mercedes-Benz and AMG vehicles, offering performance electronics (ECU Hand Held Tuner, RPM ECU-Upgrade, EVM Exhaust Valve Module, Hand-Held Suspension Module, TCU and CPC programming), hardware upgrades (Stage II and Stage III turbocharger kits, blow-off valve adapters, stainless steel downpipes and exhausts, carbon fiber hoods, aero components, suspension modules), and tiered performance packages (R1 through RIIIx) with output gains documented up to 1,196 HP on the AMG GT63 platform.
The business operates across multiple revenue streams: one-time hardware sales through a Shopify storefront and an authorized dealer network spanning North America, Europe, and worldwide; professional services for ECU re-flashes ($200-$500 per service), custom vehicle builds requiring 15-20% deposits, classic restoration, and performance development; RENNtech Certification (Certificate of Authenticity for 1967-2000 vehicles); RENNtech Kapital financing arranged with DOFC; and apparel/accessories. The customer base is concentrated in high-net-worth Mercedes-Benz/AMG enthusiasts, classic/collector vehicle owners, and bespoke build clients, with transaction sizes ranging from roughly $7,780 for a Stage II turbo upgrade to over $127,000 in parts and labor on flagship development vehicles. Limited-production projects include the 12-unit SEC Sledgehammer (2027) and the RENNtransporter Sprinter-based vehicle transport (2025).
RENNtech firmographics
Firmographics- Name
- RENNtech
- Legal name
- RENNtech, Inc.
- Website
- https://renntechmercedes.com
- Company type
- Private
- Founded year
- 1989
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- RENNtech is a privately-held American automotive performance tuning company founded in 1989, specializing exclusively in Mercedes-Benz and AMG vehicles through ECU tuning, turbocharger upgrades, custom builds, restoration, and certification services for high-net-worth enthusiasts and collectors.
- Ownership category
- akta.pro rank
RENNtech industry classification
Industry- Product category
- Automotive Aftermarket Performance Tuning
- NAICS
- Motor Vehicle Electrical and Electronic Equipment Manufacturing (33632), Motor Vehicle Gasoline Engine and Engine Parts Manufacturing (33631), Other Motor Vehicle Parts Manufacturing (33639), Automotive Parts and Accessories Retailers (44133)
- SIC
- Motor Vehicle Parts & Accessories (3714)
- akta.pro primary industry
- Aftermarket Performance & Tuning Products Manufacturing (Intakes/Turbos/ECU Tuners/Superchargers) (IMACANAN)
- akta.pro secondary industries
- Automotive ECUs/Control Modules & Embedded Electronics Manufacturing (IMACAJAC), Aftermarket Exhaust & Emissions Components Manufacturing (Mufflers/Catalysts/DPF/EGR) (IMACANAE), Performance, racing & tuning parts distribution (CRAOANAH)
Keywords
Where RENNtech is headquartered
LocationHeadquarters
- HQ city
- Stuart
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
RENNtech business model
Business model- GTM type
- B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Performance Parts and Hardware Sales: One-time sale of physical performance products including ECU upgrades, turbocharger kits, exhaust systems, suspension components, carbon fiber body parts, and air intake systems. Products are sold directly through e-commerce and dealer network with installation available at RENNtech facility or authorized installers.
- ECU Software and Reflash Services: Software programming services for engine control units. Re-Flashes of upgraded ECU Software are free for original buyers during OEM warranty period (4 years from delivery). After warranty expiration, RENNtech charges $500 for regular customers and $200 for Membership program participants.
- Vehicle Restoration and Custom Builds: High-value custom vehicle builds including frame-up restorations, engine repowers, widebody conversions, and bespoke one-of-a-kind vehicles. Programs include Custom Build, Restoration, and Performance Development services with allocations starting at 15-20% of build cost.
- Vehicle Certification Services: Authentication and certification program for RENNtech, pre-merger AMG, and Mercedes-Benz vehicles (1967-2000). Includes detailed parts inspection, historical verification, Certificate of Authenticity, and Vehicle Inspection Report. Off-site inspections also available.
- RENNtech Kapital - Vehicle Financing: Specialty vehicle financing and leasing program in partnership with DOFC (Dealer Owned Finance Company). Offers collateral-based loans secured by vehicle appraised value, flexible 12-60 month terms, and options for corporate/LLC titling for tax advantages.
- Apparel and Accessories: Sale of branded RENNtech merchandise including apparel and accessories through Shopify storefront.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | ECU Reflash Service Fee |
| Unit Pricing | Pay-as-you-go | R1 Performance Package (AMG GT R) |
| Unit Pricing | Pay-as-you-go | R2 Performance Package (G63 AMG) |
| Unit Pricing | Pay-as-you-go | R3+ Performance Package (E63 S) |
| Unit Pricing | Pay-as-you-go | Stage II Turbo Upgrade (S63 Coupe) |
| Unit Pricing | Pay-as-you-go | R3 Package (AMG GT C) |
| Unit Pricing | Pay-as-you-go | Stage II Turbo Upgrade (CLS AMG 53) |
| Unit Pricing | Pay-as-you-go | R3 Package (2017 AMG GT Development Vehicle) |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels7 records
RENNtech product offering
Product offeringCore offering
RENNtech designs, manufactures, and sells high-performance aftermarket tuning products and custom vehicle builds exclusively for Mercedes-Benz and AMG vehicles. Its product portfolio includes ECU tuning modules (HHT, RPM), turbocharger upgrades (Stage II/III), carbon fiber body components, stainless steel performance exhausts, and complete R-series performance packages (R1, R2, R3, R3+, RIIIx). The company also performs ECU software reflash services, frame-up restorations, custom vehicle builds, and vehicle certification services.
Product overview
RENNtech is an American high-performance automotive aftermarket tuning company founded in 1989, specializing exclusively in Mercedes-Benz and AMG vehicles. The company operates as a comprehensive automotive performance partner offering: (1) Performance Electronics including ECU Hand Held Tuner (HHT), RPM ECU-Upgrade, EVM Exhaust Valve Module, Hand-Held Suspension Module (HSM), TCU Upgrade, and CPC Upgrade; (2) Performance Parts including blow-off valve adapters, carbon fiber hoods, carbon fiber aero kits, stainless steel performance exhausts, downpipes with catalytic converters, and turbocharger upgrades (Stage II and Stage III); (3) Performance Packages including R1, R2, R3, R3+, and RIIIx upgrade packages for various AMG models; (4) Custom Vehicle Builds including the SEC Sledgehammer, AMG GT63 Monster, RENNtransporter, RT30, and various concept vehicles; (5) Classics Services including restoration, performance development, and custom builds for vintage Mercedes-Benz and pre-merger AMG vehicles; (6) Automotive Sales through RENNtech Autogroup; (7) Authentication Services through the Certificate of Authenticity program; and (8) Financial Services through RENNtech Kapital. Products are distributed via the company's Shopify online store and through a global dealer network. The company is headquartered in Stuart, Florida, with founder Hartmut Feyhl leading operations.
Differentiator
Problem solved
Functional benefit
Brands
- RENNtech Protect: Vehicle protection products and services for Mercedes-Benz vehicles
- RENNtransporter
- RENNtech Sledgehammer
- RENNtech RIIIx
- RENNtech Monster
- RENNtech Classics
- RENNtech Kapital
- RENNtech Certification
Products and services
- ECU Hand Held Tuner (HHT)
Quantifiable outcome
- Up to +100 HP and +84 LB-FT torque gains on Mercedes-AMG GT63 with RPM package (725 HP and 765 LB-FT total)
- +5 more outcomes
Companies that use RENNtech
Customer profileNamed customers2 records
Segments4 records
Ideal customer profiles4 records
RENNtech technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature8 records
RENNtech partnerships and signals
Strategic signalPartnerships
Eight partnerships are on record, tiered flagship and minor.
- Mercedes-Benz USA (MBUSA)flagshipMBUSA Vans partnered with RENNtech for MasterSolutions Upfitter Program collaborations including the Toolbox Van concept (2017 Chicago Auto Show) and Sprinter Extreme concept (2016 Chicago Auto Show). RENNtech provides custom vehicle engineering and design services for MBUSA promotional concepts.
- Ranger DesignminorSelected upfitter partner for the Mercedes-Benz Metris Toolbox Van concept, providing shelving units and interior storage solutions showcased at the 2017 Chicago Auto Show.
- Sortimo by KnapheideminorSelected upfitter partner for the Mercedes-Benz Metris Toolbox Van concept, providing shelving units and interior storage solutions showcased at the 2017 Chicago Auto Show.
- Scattolini (ScattoMaax)minorPartner for the Sprinter Extreme concept providing the ScattoMaax 'Tipper Bed' three-way hydraulic dump bed system with 5,200+ lbs payload capacity, available through Mercedes-Benz MasterUpfitter program.
- Foam Innovation StudiosminorCreated custom foam boulder props for Sprinter Extreme concept vehicle display, constructed with 18 large boulders inside the truck bed for visual demonstration of dump bed functionality.
- McNicholsminorSupplier of heavy-duty 1/4-inch thick stainless steel wire mesh integrated within Sprinter Extreme custom aluminum truck bed design.
- MetroWrapzminorPerformed 3M vinyl wrap installation on Sprinter Extreme concept featuring bright green 'HULK' inspired design with mud graphic effect using 3M print film SV480Cv3 with matte overlaminate.
- Vision XminorSupplier of high-intensity LED lighting components for Sprinter Extreme including 8.7-inch CANNON lights, Optimus Dual lights, and additional off-road lighting totaling 10 light units across roof rack, bull bar, and front fascia.
Scale indicators5 records
Recent moves6 records
Expansion highlights6 records
RENNtech competitors and assessment
Company assessmentDirect peers
- Kleemann: Danish Mercedes-Benz performance tuner offering ECU upgrades, supercharger kits, exhausts, and wheels. Similar product mix and Mercedes-only focus with established 35+ year heritage.
- Brabus: Germany's leading independent Mercedes-Benz tuner and luxury bespoke builder. Closest direct competitor: offers ECU tuning, performance packages, coachbuilt vehicles (Rocket, 900 Series) and operates a global dealer network analogous to RENNtech's.
- Lorinser: Long-established German Mercedes-Benz tuning specialist offering ECU upgrades, exhaust, aero, and bespoke interior packages. Directly competes with RENNtech in the AMG performance aftermarket, particularly in Europe.
- Prior Design: German widebody and aerodynamic specialist for Mercedes, BMW, Porsche, and luxury vehicles. Comparable on carbon fiber aero, body kits, and design-driven Mercedes mods.
- Mansory: Luxury vehicle tuner specializing in extreme aesthetic and performance bespoke builds across Mercedes, Rolls-Royce, Bentley, and Ferrari. Comparable on the ultra-premium bespoke vehicle segment (similar halo-product positioning to RENNtech Sledgehammer/Monster).
- G-Power: German performance tuner focused on BMW M and Mercedes-AMG with proprietary supercharger and turbocharger systems (e.g., G-Power M5/M6 and AMG packages). Comparable in ECU tuning depth and horsepower-gain-focused product philosophy.
- Carlsson: German Mercedes specialist (founded 1989) producing tuning, aero, and bespoke wheels for Mercedes and AMG models. Comparable on product breadth and Mercedes-only focus, slightly more aesthetic than performance-oriented than RENNtech.
Emerging players
- Edo Competition: German tuner focused on high-performance Mercedes and Porsche variants. Comparable on ECU/turbo upgrade methodology and bespoke Mercedes builds, with a more boutique scale.
Others
- Vossen: Luxury aftermarket wheel manufacturer serving high-end European and exotic vehicle segments. RenNtech forges its own wheels but Vossen represents an adjacent enabling supplier of premium wheels to the same luxury/AMG customer base.
Broad incumbents
- Mercedes-AMG (Mercedes-AMG GmbH): OEM's own performance division — historically the brand's mothership from which RENNtech spun out. Competes with aftermarket tuners by offering factory-backed performance variants that limit the addressable upgrade market.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
RENNtech social profiles
Digital presenceRENNtech financial estimates
Financial estimateRevenue estimate
Valuation estimate
RENNtech leadership team
Management profileNumber of profiles
Profiles1 record
RENNtech subsidiaries and ownership
Company hierarchySubsidiaries6 records
RENNtech funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
RENNtech M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about RENNtech
What does RENNtech do?
RENNtech designs, manufactures, and sells high-performance aftermarket tuning products and custom vehicle builds exclusively for Mercedes-Benz and AMG vehicles. Its product portfolio includes ECU tuning modules (HHT, RPM), turbocharger upgrades (Stage II/III), carbon fiber body components, stainless steel performance exhausts, and complete R-series performance packages (R1, R2, R3, R3+, RIIIx). The company also performs ECU software reflash services, frame-up restorations, custom vehicle builds, and vehicle certification services.
Is RENNtech a public or private company?
RENNtech is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was RENNtech founded?
RENNtech was founded in 1989. It employs 11 to 50 people.
Where is RENNtech based?
RENNtech is headquartered in Stuart, United States, in the North America region.
How does RENNtech make money?
Six revenue lines are on record. Performance Parts and Hardware Sales are the primary driver. The others are ECU Software and Reflash Services, vehicle Restoration and Custom Builds, vehicle Certification Services, RENNtech Kapital - Vehicle Financing and apparel and Accessories.
Who are RENNtech's main competitors?
Direct peers on record are Kleemann, Brabus, Lorinser, Prior Design, Mansory, G-Power and Carlsson. Edo Competition is listed as an emerging player. Vossen is listed as an others. Mercedes-AMG (Mercedes-AMG GmbH) is listed as a broad incumbent.
Does RENNtech have an API?
No public API is recorded for RENNtech.
What industry is RENNtech in?
RENNtech's product category is Automotive Aftermarket Performance Tuning. Its primary akta.pro industry code is IMACANAN, Aftermarket Performance & Tuning Products Manufacturing (Intakes/Turbos/ECU Tuners/Superchargers), with a secondary code of IMACAJAC, Automotive ECUs/Control Modules & Embedded Electronics Manufacturing. Its NAICS code is 33632 and its SIC code is 3714.