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Porsche > Boxster 986/987/981 (1997-2016) > Boxster 986 2.5L 1997-99 > Exhausts >

Switchable Silencers / Mufflers

Switchable Silencers / Mufflers

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DISPLAYING 1 to 3 (of 3 products)
SOUL Exhaust muffler bypass conversion, Valved. Porsche 986 Boxster - POR.986.VMBC, 99611112106, 99611112107, 99611114105, 99611114202, 99611114211, 99611115101, 00004420009, 00004420010, 00004420011, 00004420012 - POR.986.VMBC
7
SOUL Exhaust muffler bypass conversion, Valved. Porsche 986 Boxster
POR.986.VMBC
Product Information
Product Information
Porsche 986 Boxster SOUL Valved Muffler Bypass Conversion.

Transform the sound and character of your Porsche 986 Boxster (1997–2004) with SOUL’s Valved Muffler Bypass Conversion. These direct bolt-on pipes replace the factory exhaust section, delivering a refined OEM note with valves closed and an aggressive, CUP car–inspired roar with valves open. By default, the valves remain closed at startup for a smooth, neighbor-friendly warm-up, and with a press of a button you unleash the unmistakable flat-six tone.

•  Fits all Porsche 986 Boxster models (1997 – 2004)
•  Valves closed on startup for a quiet, drone-free OEM experience
•  Remote valve control included, with compatibility for factory HomeLink buttons (if equipped)
•  Designed and hand-built in-house at SOUL’s Willow Grove, PA facility
•  Backed by SOUL Performance Products’ Lifetime Warranty for both street and track use


DEVELOPMENT:
SOUL engineered this system to offer the flexibility of two exhaust personalities in one. With valves closed, it’s quiet and refined—perfect for everyday driving or early morning startups. Open the valves, and the mufflers are bypassed to create a raw, motorsport-inspired soundtrack, all while minimizing drone.

SOUND:
Valves closed, your Boxster retains its stock tone. Open them, and exhaust gases flow directly through the bypass tubes, producing an aggressive bark and thrilling flat-six roar that transforms the driving experience.

CONSTRUCTION:
Each system is fabricated in-house using brand new OEM Porsche muffler piping and high-quality, application-specific valves. Exhausts are built in precision aluminium fixtures to guarantee fitment, rigorously tested, and foam-packed for safe delivery.

BOLT ON AND GO:
The design allows for straightforward installation with no cutting or modifications. Simply bolt on and enjoy the ability to switch between OEM refinement and track-day aggression with the included remote valve controller.

LIFETIME WARRANTY:
The design allows for straightforward installation with no cutting or modifications. Simply bolt on and enjoy the ability to switch between OEM refinement and track-day aggression with the included remote valve controller.

Please note: This item is not a stock product. It is a special order part and once ordered with us is not subject to cancellation or return unless proven not fit for purpose or defected.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

POR.986.VMBC
POR.986.VMBC
99611112106
99611112107
99611114105
99611114202
99611114211
99611115101
00004420009
00004420010
00004420011
00004420012

The product you are viewing cross references to these numbers
Switch set for sound valves. All Porsche models - 98622094335SSOUND - R2 (591209-02)
1
Switch set for sound valves. All Porsche models
9996001111
Product Information
Product Information
Switch set for sound valves.



Fits:
All Porsche models with vacuum operated valvetronic exhaust systems

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9996001111
98622094335SSOUND

The product you are viewing cross references to these numbers
Universal Exhaust Vacuum Valve Controller - 9MUVCKIT
2
Universal Exhaust Vacuum Valve Controller
9MUVCKIT
Product Information
Product Information

9m Universal Exhaust Vacuum Valve Controller

Take greater control of a vacuum-operated sports exhaust system with the 9m Universal Exhaust Vacuum Valve Controller.

Developed by Ninemeister to enhance the functionality of exhaust valve systems, the controller allows the exhaust valves to be operated remotely using the supplied key fobs. The kit uses a vacuum control module and is designed for straightforward installation without cutting or splicing into the vehicle's factory wiring or fuses.

What Does the Exhaust Valve Controller Do?

Many sports exhaust systems use vacuum-operated valves to change the route exhaust gases take through the silencer. Opening or closing these valves alters the exhaust sound.

The 9m controller provides additional control over this system, allowing the driver to operate compatible vacuum exhaust valves using a dedicated remote key fob.

This is particularly useful for vehicles fitted with a valved sports exhaust where the owner wants convenient independent control of the exhaust valves.

Why Upgrade?

A dedicated exhaust valve controller gives the driver greater control over when the exhaust valves operate.

The 9m system is also designed to minimise installation complexity. Power is supplied through a cigarette lighter adaptor, so there is no requirement to cut or splice into the factory wiring or fuse system.

Kit Includes

  • 9m vacuum control module
  • Two remote-control key fobs
  • Vacuum tubing
  • Cigarette lighter power adaptor
  • High-quality remotes with Ninemeister logo
  • Components required for straightforward connection and installation

Key Features

  • Universal vacuum exhaust valve controller
  • Remote operation of compatible exhaust valves
  • Supplied with two key fobs
  • Simple power connection
  • No cutting of factory wiring required
  • No splicing into factory fuses
  • Ideal for compatible valved sports exhaust systems
  • Ninemeister branded remote controls

Universal Vacuum Exhaust Valve Controllers

A vacuum exhaust valve controller is an ideal addition to a compatible valved sports exhaust, giving the driver convenient remote control over exhaust valve operation.

Rather than relying solely on the vehicle's original exhaust valve strategy, the 9m controller provides a dedicated remote-control solution while avoiding permanent modifications to the factory wiring.

For Porsche owners searching for a remote exhaust valve controller, vacuum-operated sports exhaust controller or universal valved exhaust remote, the 9m kit provides a simple solution suitable for compatible vacuum-controlled exhaust systems.

DISPLAYING 1 to 3 (of 3 products)
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About Switchable Silencers / Mufflers

Porsche Switchable Silencers & Mufflers - Dual-Mode Performance Exhaust Systems

Switchable Silencers / Mufflers offer Porsche owners the best of both worlds—refined, road-friendly exhaust sound when cruising, and an aggressive, performance-focused tone at the touch of a button. Using valve-controlled technology, these exhaust systems allow drivers to switch between quiet and sport modes, delivering enhanced sound, performance, and driving engagement on demand.

Available from Design911, Porsche switchable silencers include both genuine Porsche-engineered systems and high-quality aftermarket performance options, all designed to integrate seamlessly with your vehicle’s existing exhaust components and control systems.

What Do Switchable Silencers / Mufflers Do?

Switchable silencers use internal exhaust valves to control sound level and exhaust flow.

Core Functions:

  • Allow selectable quiet and sport exhaust modes.
  • Improve exhaust gas flow under performance driving.
  • Enhance throttle response and engine efficiency.
  • Maintain refined sound levels for everyday driving.
  • Deliver a more engaging driving experience on demand.

These systems adapt your Porsche’s character to suit any driving situation.

Why Do Standard Exhaust Silencers Fail or Fall Short?

Factory exhaust systems are designed to meet noise regulations and long-term durability requirements, which can limit performance and sound. Common issues include:

  • Internal corrosion from heat and condensation.
  • Restrictive baffling reducing exhaust flow.
  • Fixed sound levels with no adaptability.
  • Valve or actuator wear in older switchable systems.
  • Limited performance compatibility with tuned engines.

Over time, standard silencers may lose efficiency, sound quality, or reliability.

Why Upgrade to Switchable Silencers / Mufflers?

Upgrading to a switchable exhaust system enhances both performance and versatility.

Upgrade Benefits:

  • Dual-mode exhaust sound at the press of a button.
  • Improved exhaust flow for better performance.
  • Sportier, more engaging exhaust note when desired.
  • Maintains comfort and compliance in quiet mode.
  • Ideal for road, touring, and spirited driving.

Whether OEM or aftermarket, switchable silencers offer flexibility without compromise.

Highlights

  • Porsche switchable silencer and muffler upgrades
  • Valve-controlled exhaust sound adjustment
  • OEM Porsche and premium aftermarket options
  • Improved performance, sound, and driving engagement
  • Compatible with factory systems and controls       

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