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SIMONS Silencer Big - 63,5mm - LEISE

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

SIMONS Universal Stainless Steel Muffler – Compact, Quiet & High-Quality Swedish Construction

This universal SIMONS muffler features a compact 420 mm body and an oval 185×115 mm shell — designed to deliver excellent noise reduction while maintaining optimal exhaust flow for engines up to approx. 350 HP. Manufactured entirely in Sweden from premium-grade stainless steel (1.4307), SIMONS mufflers are known for their outstanding acoustic performance and long-lasting durability. The straight-through absorption core minimizes back pressure and ensures efficient performance whether installed as a front, mid or rear muffler.

Key Features

  • High-quality stainless steel 1.4307
  • Very quiet – superior sound damping in independent tests
  • Compact oval design: 185 × 115 mm
  • Straight-through perforated absorption core (no chambers)
  • Suitable for engines up to approx. 350 HP
  • 63.5 mm slotted inlet – clamp- or weld-ready
  • Made in Sweden – premium craftsmanship

Technical Specifications

  • Material: Stainless Steel 1.4307
  • Body Length: 420 mm
  • Diameter / Shape: 185 × 115 mm oval
  • Inlet Size: 63.5 mm (inner diameter, slotted)
  • Performance Range: Up to approx. 350 HP
  • Weight: 3.8 kg

Noise Reduction Comparison

Sound reduction values from idle & 2000 rpm tests vs. open pipe:
  • 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 difference of 10 dB equals about half perceived loudness.

Legal Notice

No TÜV approval. For motorsport or individual approval (§21) only.

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