Please wait… 
Please wait while we process your order,
do not press the back button… 
Design911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk Facebook Instagram
Porsche specialists based in the UK
Porsche > Cayman 987C / 981C (2005-2016) > Cayman S 3.4L 987C 2005-08 > Exhausts >

Switchable Silencers / Mufflers

Switchable Silencers / Mufflers

Filter by brand
DISPLAYING 1 to 5 (of 5 products)
Exhaust Muffler / Silencer Sports VALVETRONIC DesignTek for Boxster 987 / Cayman - 98711311200, 98711311204, 98711311205, 987113112AX, 98711311801, 98711311802, 987113118AX, 98711311400, 98711311402, 98711311403, 987113114AX, 98711311100, 98711311104, 98711311105, 987113111AX, 98711311701, 98711311702, 987113117AX, 98711311300, 98711311302, 98711311303, 987113113AX, 98711351260, 987113512CX, 98711311800, 98711351160, 987113511CX, 98711311700
3
Exhaust Muffler / Silencer Sports VALVETRONIC DesignTek for Boxster 987 / Cayman
3606008704
Product Information
Product Information


DesignTek Valvetronic sports exhaust system gives smooth 12Bhp/15 ft-lbs of torque to the wheels with the valves opened, +8HP/10 ft-lbs of torque to the wheels with the valves closed. Made from high quality 14-16 gauge T304 stainless steel, hydro-formed muffler cases, radiuses stressed relieved with 2000 degree ceramic fiber and stainless steel wool packed free flow mufflers.

This unique exhaust configures a dual-tone setup controlled by a key fob which you can switch on the fly. Direct replacement for the factory mufflers and will work with the stock primary pipe and cats or DesignTek primary bypass pipe.

High-Performance Rear Exhaust with sound switch:
● Push the sound-button between:
Switch closed: Deep Sports Turbo Sound

Switch opened: Perfect Racing Sports Sound

Superb sports car sound, throaty and deep with the valves opened, but docile with the valves closed.

This system comes complete with stainless steel tail pipes.

Please note the remote controllers do not come with batteries. You will have to source them at your own cost. The type is CR2025

Fits:
Porsche Boxster 987 GEN1
Porsche Cayman 987c GEN1

For Wiring Diagram please CLICK HERE



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Related, superseded, cross reference or alternative numbers for comparison.

3606008704
98711311200
98711311204
98711311205
987113112AX
98711311801
98711311802
987113118AX
98711311400
98711311402
98711311403
987113114AX
98711311100
98711311104
98711311105
987113111AX
98711311701
98711311702
987113117AX
98711311300
98711311302
98711311303
987113113AX
98711351260
987113512CX
98711311800
98711351160
987113511CX
98711311700

The product you are viewing cross references to these numbers
Sports Exhaust Silencer, Stainless Steel Valved. Porsche 987.1 Boxster / 987.1 Cayman 2005–08 - 98711311200, 98711311204, 98711311205, 98711311801, 98711311802, 98711311803, 98711311400, 98711311402, 98711311403, 98711311100, 987113111004, 98711311105, 98711311701, 98711311702, 98711311703, 98711311300, 98711311302, 98711311303 - 9MSV98711311731
3
Sports Exhaust Silencer, Stainless Steel Valved. Porsche 987.1 Boxster / 987.1 Cayman 2005–08
9MSV98711311731
Product Information
Product Information

9m Sports Stainless Steel Valved Silencer 

Upgrade the sound and character of your Porsche 987 Boxster or Cayman with the 9m Sports Stainless Steel Valved Silencer. The valved design gives the driver control over the exhaust character at the push of a button, allowing you to switch between a quieter exhaust note and a louder, more sporting tone. 9m also specifies a noticeable improvement in sports car sound and throttle response.

Fits:

  • Porsche Boxster 987 2.7L 2005-08/08
  • Porsche Boxster 987 S 3.2/3.4L 2005-08/08
  • Porsche Cayman 2.7L 987C 2006-08
  • Porsche Cayman S 3.4L 987C 2005-08

Manufactured from precision-welded 304-grade stainless steel, the system is designed as a direct replacement for the original Porsche rear silencer, with no cutting or welding required.

What Does the Valved Exhaust Do?

The exhaust valves alter the path of the exhaust gases through the silencer. This allows the system to provide a more subdued sound when required and a more pronounced sports exhaust note when the valves are opened.

This makes it particularly suitable for a road-going Porsche where you may want a quieter exhaust during normal driving while retaining the option of a more engaging sound when desired.

Why Upgrade?

The factory exhaust is designed to balance refinement, noise regulations and performance. For owners looking for greater exhaust character, the 9m valved silencer provides additional sound without permanently committing the car to a louder exhaust note.

The X-pipe-style system also gives the rear of the car a more purposeful appearance, with a choice of black or silver slash-cut exhaust tips.

Direct Bolt-On Installation

The 9m system is designed to replace the OEM muffler using a direct bolt-on installation, requiring no cutting or welding. This makes it a straightforward exhaust upgrade without unnecessary modification to the vehicle.

9m states that the silencer complies with emissions regulations and does not trigger the Check Engine Light.

Key Features

  • 9m valved sports rear silencer
  • Precision-welded 304-grade stainless steel
  • Switchable quiet and sports exhaust sound
  • Push-button valve control X-pipe-style configuration
  • Improved sports car exhaust note
  • Noticeable improvement in throttle response claimed by 9m
  • Direct replacement for the OEM muffler
  • Direct bolt-on installation
  • No cutting or welding required
  • Choice of black or silver slash-cut tips
  • Designed not to trigger the Check Engine Light

Porsche 987 Boxster & Cayman Valved Sports Exhaust Systems

A valved sports exhaust is an ideal upgrade for Porsche Boxster and Cayman owners who want additional engine and exhaust character without having a permanently loud system.

The 9m stainless steel valved silencer combines switchable sound control with durable 304-grade stainless steel construction and direct bolt-on fitment. Opening the valves provides a more sporting exhaust note, while the quieter setting is better suited to relaxed road driving.

For owners searching for a Porsche 987 Boxster sports exhaust, Cayman valved exhaust, stainless steel Porsche rear silencer or direct-fit Porsche 987 exhaust upgrade, the 9m system provides a practical combination of sound, construction quality and straightforward installation.



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

9MSV98711311731
98711311200
98711311204
98711311205
98711311801
98711311802
98711311803
98711311400
98711311402
98711311403
98711311100
987113111004
98711311105
98711311701
98711311702
98711311703
98711311300
98711311302
98711311303

The product you are viewing cross references to these numbers
SWITCH CONSOLE for Exhaust Muffler 'Switchable' System - 99761312900, 99761312900FMH, 99761313100, 99761313100FMH
4
SWITCH CONSOLE for Exhaust Muffler "Switchable" System
Special Order item
99761312900FMH
Product Information
Product Information
This is the switch required for the original Porsche sport exhaust For cars WITHOUT "PASM" electronic damper control

This is the switch required for the original Porsche sport exhaust system our part number code 99994420103

Fits:
For cars WITHOUT "PASM" electronic damper control
Porsche 997 MKI Carrera
Porsche 997 MKI Carrera S

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

99761312900FMH
99761312900
99761312900FMH
99761313100
99761313100FMH

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 5 (of 5 products)
Also found on these pages
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       

You may also like
Popular Models