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Innovations
- Products
  - As a system partner and OEM, we have a day-to-day obligation to some of the world's leading automotive manufacturers.
- Development
  - We work on achieving the ideal relationship between lightweight construction and endurance, emission figures and acoustics.
- Testing
  - Before series production begins, our components undergo comprehensive simulations and tests.
- Production
  - We aim for perfect production processes with consistent improvements in flexibility, automation and rationalisation.
- Logistics
  - In 1993 Boysen built the world's first local assembly plant for just-in-sequence (JIS) production and delivery of complete exhaust systems.
Careers
- Remuneration package
  - In everything we do, people are the most important factor.
- Job-Offers
  - Boysen offers a wide range of possibilities, whether you are a recent graduate or an experienced professional.
- Privacy Policy
  - In everything we do, people are the most important factor.
Responsibility
- Employees
  - Boysen consistently invests in ensuring the best possible working conditions and promotes constructive teamwork.
- Partners
  - For Boysen, fair cooperation is the basis for sustainable and successful business relationships.
- Environment
  - As a foundation company, Boysen always considers conservation of the natural world and the quality of life of future generations.
- Quality
  - As a system partner to leading vehicle manufacturers, we bear a huge amount of responsibility for the quality of our products and services.
Company
- We are Boysen
  - Boysen is a specialist in exhaust technology.
- Facts & figures
  - As a system partner to well-known car and commercial vehicle manufacturers, the industry has been putting its trust in us for decades.
- Friedrich A. Boysen
  - Friedrich A. Boysen (1895 - 1975) is considered one of the pioneers of modern silencer technology.
- Foundation
  - Since 1996, the Friedrich and Elisabeth Boysen Foundation has been supporting academic research in the field of environmental technology.

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BAK Boysen Abgaskomponenten GmbH & Co. KG

Simmersfeld

Designed around state-of-the-art process technology and logistics, the Boysen plant BAK is geared towards highly flexible production of components and complete exhaust systems for passenger cars, commercial vehicles and off-highway applications. In addition, the site focuses on the production of structural components for electric vehicles. Since the start of production in 2001, the plant has been continuously expanded - for example in 2017 with the construction of the Group's largest production plant in Germany to date (BAK II), which was realised as part of a major order from Daimler Truck. Most recently, in 2024, the BAK Development Centre was opened in the immediate vicinity of the large factory, focusing on solutions for electromobility.

Start of production

BAK I	2001
Pressing plant	2004
Extension BAK I	2005
BAK II	2018

Production area

BAK I	12,000 m²
Pressing plant	12,000 m²
BAK II	48,000 m²

Facts

Employees	800
Services	Assembly production (exhaust pipes, catalytic converters, silencers) and series and just-in-sequence production of complete exhaust systems, stamped and drawn parts, welding and cutting of assemblies with laser systems, production of structural components for e-vehicles, Prototype construction for hydrogen tank systems and battery casings, production of motorbike frames
Customers	Mercedes-Benz Sindelfingen plant, Mercedes-Benz engine plants, Daimler Truck, Audi Ingolstadt, Neckarsulm and Györ, Porsche, BMW, Boysen Group

Key features

BAK I	ACB canning systems for oval and circular catalytic converters, SCR canning, 3 silencer body manufacturing lines, 2 automatic measuring cells, JIS production for Mercedes-Benz E-Class, insulation assembly
Pressing plant	Large presses 1,000 t, 1,600 t and 2,000 t , internal high pressure systems from 800-2,000 t, annealing furnaces
BAK II	Fully automated manufacturing, handling and storage systems, upgrade assembly of electronic and vehicle components, optical 3D measurement technology, real-time process monitoring via digital control centre, laser centre
Energy location Simmersfeld	large-scale photovoltaic systems; gas-fired combined heat and power plant; certified environmental management according to ISO 14001 and EMAS; public electric car charging points