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SIMONS Silencer Super - 63,5mm - LEISE

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

SIMONS Universal Stainless Steel Muffler – Ultra Quiet & Performance-Oriented

For performance builds, restorations, swap projects, or custom exhaust fabrication — the SIMONS universal muffler delivers exceptional noise reduction without compromising engine performance. Made entirely in Sweden, SIMONS mufflers are renowned for their outstanding acoustic damping and build quality, outperforming many competing brands in independent tests. This model features a fully straight-through absorption design, ensuring minimal back pressure while maintaining an impressively quiet exhaust note. With its oval body shape, high-quality stainless steel construction, and slotted 63.5 mm inlet, installation is simple via clamping or welding.

Key Features

  • Premium stainless steel construction (1.4307)
  • Extremely quiet – top-rated damping in SIMONS tests
  • Straight-through absorption design for maximum performance
  • Suitable as front, mid, or rear muffler
  • Ideal for engines up to approx. 350 HP
  • Oval body for superior noise reduction
  • Made in Sweden – no low-cost imports

Technical Specifications

  • Material: Stainless Steel 1.4307
  • Body Length: 320 mm
  • Diameter: 185 × 115 mm (oval)
  • Connections: 63.5 mm (inner diameter, slotted)
  • Performance Rating: Up to 350 HP
  • Weight: 3.2 kg

Noise Comparison & Sound Reduction

Independent measurements (idle & 2000 rpm, vs. no muffler installed) showed the following reductions using SIMONS 76 mm models — values can be projected to 63.5 mm and 89 mm versions based on body size:

  • 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*

*Values are approximate. A reduction of 10 dB is perceived as half the loudness.

Legal Notice

No TÜV approval. For motorsport applications or custom single approval (§21) only.

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