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SIMONS Silencer Duo - 63,5mm - LEISE

"SIMONS Silencer Duo - 63,5mm - LEISE"

SIMONS Universal Stainless Steel Dual-Flow Muffler – Extremely Quiet & High-Performance

This compact dual-inlet and dual-outlet SIMONS muffler is designed for high-performance exhaust systems requiring symmetrical flow or true duplex layouts. With a 315 mm body and 2×63 mm connections on both inlet and outlet sides, it delivers excellent flow capacity for engines up to approx. 600 HP. The oval housing (190×120 mm) provides outstanding sound damping while maintaining minimal back pressure thanks to its straight-through perforated absorption core. Manufactured entirely in Sweden using premium stainless steel (1.4307), this muffler guarantees long-lasting durability and superior acoustic performance.

Key Features

  • High-grade stainless steel 1.4307
  • Dual inlet & dual outlet: 2×63 mm (slotted, clamp-fit compatible)
  • Extremely quiet – optimized acoustic absorption
  • Oval housing (190×120 mm) for enhanced noise control
  • Straight-through perforated core for maximum flow
  • Suitable for engines up to approx. 600 HP
  • Ideal for true dual systems or symmetrical exhaust layouts
  • Made in Sweden – premium quality manufacturing

Technical Specifications

  • Material: Stainless Steel 1.4307
  • Body Length: 315 mm
  • Diameter / Shape: 190 × 120 mm oval
  • Connections: 2× 63 mm (inlet) & 2× 63 mm (outlet)
  • Outlet Spacing: 14 mm (+/− 2 mm)
  • Performance Range: Up to approx. 600 HP
  • Weight: 4 kg

Noise Reduction Comparison

Measured values (idle & 2000 rpm vs. no muffler):
  • 76 mm Split: −5 dB*
  • 76 mm Turbex: −7 dB*
  • 76 mm Turbo: −8 dB*
  • 76 mm Turbolight: −7 dB*
  • 76 mm Turbonett: −2 dB*
  • 76 mm Turbotight: −3 dB*

*Approximate values. A 10 dB reduction corresponds to about half perceived loudness.

Legal Notice

No TÜV approval. Motorsport use or individual approval (§21) required.

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