We manufacture tailor-made silencers with tested noise reduction and back-
pressure. Our designers adapt elegantly the geometry to the avail-able construction space.  Materials of exhaust parts are of ultimate and certified quality, resistant to corrosion and temperature to ensure a long life. The competence of USO includes all processes of manufacturing. Design is based on space envelope and technical datasheet of the OEM.

Tests are focused specifically on three performance variables:

Reduction of sound and heat
Sound level is measured on an engine without and with the muffler on a 15-25 decibel
scale (dBA). Typical mufflers use pipes, baffles, expansion chambers and insulation

The lower is the backpressure, the more efficient is the engine performance. It is the
main indicator for horsepower and fuel economy. Backpressure is the force necessary to
flow gasses through the exhaust system, or the resistance to exhaust flow.

Position, mounting supports, weight and material type are the key components to the
configuration. Friction, momentum effects, expansion, contraction elbows and velocity
head loss at outlet are important system considerations.

Materials Used in Qualities
Aluminized Mild
Mufflers Good Corrosion
Stainless Steel
(with or w/o alu.coating
Flexible Tubing Stronger
Mufflers Excellent Corrosion
Temperature Limit 800 C
Chrome Accessories Bright Mirror Finish
Galvanized Flexible Tubing Low Material Cost
  Temperature Limit 300 C
Cold Rolled Accessories Poor Coırrosion
Low Cost

• Low Carbon Cold Rolled Steel (CRS) is commonly used
for parts that are not exposed to corrosive acids
• Aluminized Steel provides galvanic protection against
corrosion with a thin layer of aluminum,
• 300 and 400 series Stainless Steel, mostly 304 and 409,
are used for diesel heavy-duty applications under high
stresses and temperatures
Market segments
• On-road vehicles & buses
• Agricultural vehicles
• Military vehicles
• Power generators
• Industrial machinery
• Mobile air units