As a system partner and OEM, we have a day-to-day obligation to some of the world's leading automotive manufacturers. But the highest demands are those we set ourselves. Boysen brand products stand for optimum quality and endurance.

As an exhaust system specialist, Boysen produces manifolds, catalytic converters, particulate filters, silencers, exhaust flaps and trims. Complete exhaust systems for high-quality cars, commercial vehicles and off-highway applications are at the upper end of our technological know-how.

Following technological changes within the automotive industry, we have succeeded in applying our core competencies to other product groups as well. These primarily include battery cases for electric vehicles, which we have been manufacturing in large-scale production at two locations since 2025.

Battery cases made from extruded aluminium profiles

Cell-to-pack battery cases of steel deep-drawn parts · storage systems for gaseous and liquid hydrogen · electric heating disc and burner system for active exhaust gas heat management

Modular exhaust flaps · individual components for motorbike frames

Structural components for e-vehicles

Redox flow battery systems

Serial exhaust systems for heavy duty commercial vehicles and off-highway applications

Gasoline Particulate Filters (GPF)

BASM Boysen Active Sound Modelling

SCR systems for commercial vehicles

Electric exhaust flap

SCR technology

Denox storage catalytic converter

Trim production

Diesel particulate filter

Manifold/turbocharger unit with close coupled ceramic catalytic converter

Soldered exhaust manifold

Cartridge catalytic converter with 1,200 cpsi monoliths

Tailored pipes

Controlled Helmholtz resonator silencer

Turbo manifold

Silencer with integrated catalytic converter

Stuffed close coupled ceramic catalyst

Close coupled metal catalyst converter

Air gap insulated diesel manifold

Tube manifold

Helmholtz resonator

Stuffed cartridge catalytic converter

Series exhaust manifold with air gap technology

Catalytic converter with wire pad embedding

Metal catalyst converters

Baffled silencer

Thermal reactor for rotary piston engines