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Design 911 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://d911api.datadial.net/images/schemaLogo.png https://d911api.datadial.net/images/schemaLogo.png +443456003478 https://d911api.datadial.net Facebook Instagram

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DISPLAYING 1 to 8 (of 8 products)
99722097330SSOUND
Product Information
Product Information
Replacement Rear sport exhaust set OE style with adjustable sound valves. Bead blasted stainless steel.

danskmotorsport

Fits:
Porsche 997 3.8L C2S /C4S 08/2004-07/2008
Porsche 997 3.6L C2 /C4 08/2004-07/2008 *** please also use tail pipe 99711197901S
Output flange 2.25" / 58mm

Please note: This valvetronic exhaust does not come with fitting kit. If your car doesn't have sport switchable system already fitted you can buy fitting kit with remote controls CLICK HERE

Listen to the set with OPEN Valves



Listen to the set with CLOSED Valves



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Related, superseded, cross reference or alternative numbers for comparison.

99722097330SSOUND
1620610500
97330SSOUND
97.330SSOUND
99711121203
99711123203
99711121202
99711123202
99711141204
99711143204
99711110500
99711110600
99711161103
99711121103

The product you are viewing cross references to these numbers
Special Order item
99704420103
Product Information
Product Information
Exhaust Muffler / Silencer Sports System

porsche

The Porsche sound is a legendary mix of power, presence and athletic potential. Now you can make even more of your car with this stainless steel sports exhaust system. Sound output varies as throttle inputs change, from a standard note during normal road driving to a more aggressive tone under high-performance use. A soundproofing switch enables you to reduce noise output to standard levels when required. Includes stainless steel tailpipes with hard-chrome finish.

This product requires a extra switch which is not included in the kit you have two choices
1.
99761312900FHM Cars WITHOUT "PASM" electronic damper control
2. 99761313100FHM Cars WITH "PASM" electronic damper control

Fits:
Porsche 997 MK1 C2 / C4 / C2S / C4S 2005>>

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Related, superseded, cross reference or alternative numbers for comparison.

99704420103
99704420103

The product you are viewing cross references to these numbers
3606009716
Product Information
Product Information
DesignTek Exhaust Muffler / Silencer Sports VALVETRONIC

Fits:
Porsche 997 C2, C4, C2S, C4S
*if you buy this exhaust for none S models please order new tail pipes from us!
Output flange 2.25" / 58mm

*if you buy this exhaust for the model with the Porsche Sports Exhaust you will need to purchase new S-type tailpipes. If you have a factory Porsche PSE (Porsche sport exhaust) this system can replace the original exhaust boxes, you will be able to use the original switches in your car

DesignTek Valvetronic sports exhaust system gives smooth 15Bhp/17 ft-lbs of torque to the wheels with the valves opened, 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 catalytic converters or any aftermarket sport cats designed to fit with OEM exhaust systems

Superb sports car sound, throaty and deep with the valves opened, but docile with the valves closed. You can reuse your factory OEM Porsche tips or you can opt for DesignTek tail pipes.

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

Installation instructions for Valvetronic Mufflers CLICK HERE

For Wiring Diagram please CLICK HERE

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

3606009716
99711197901S
3606409703
99711121102
99711121103
99711123102
99711123103
99711121202
99711121203
99711123202
99711123203
99711141103
99711141104
99711143103
99711143104
99711141203
99711141204
99711143203
99711161100
99711161103
99711161102
99711161200
99711161202
99711161203

The product you are viewing cross references to these numbers
3606609716
Product Information
Product Information
Exhaust muffler bypass x-pipe with headers, Valvetronic.

designtek

DesignTek® exhausts are built for the sound and performance to enhance your Porsche 997 GT3. This kit includes Cat-back with valves, Manifolds and Matt black chromed tail pipes

Fits:
Porsche 997 GT3 / GT3RS 2007>>

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

3606609716
3606609716
69-PS115V

The product you are viewing cross references to these numbers
TSPOGT3C10.093.A
Product Information
Product Information
Sports exhaust side silencer straight pipe with valves.
Replaces rear side silencers with straight pipes

tubi

Fits:
Porsche 911 GT3 and GT3 RS (997 Gen 1 and Gen 2)
Porsche 911 GT3 and GT3 RS (991.1 and 991.2 upto 2019)

This product can be mounted on every GT3, GTR RS, GT3 RS 4.0 versions, both on 997 Gen 1, Gen 2 and on 991.1 and 991.2 up to 2019

The component is perfectly interchangeable with the original components, following the instructions in the constructor's workshop manual

RACETRACK USE ONLY
These components are designed and developed for racetrack use and to maximise the car's performance. They are not street legal and must be installed by professionals in the sector

SOUND - STRAIGHT PIPE
The straight pipe version guarantees a direct path from the engine, removing all factors which may affect the acoustic tuning

SYSTEM FINISH - POLISHED
Mirror finishes are highly reflective and created by polishing the stainless steel. The polishing process enhances appearance and consistency, making cleaning easier. A special rolling procedure is used. It is essential to remove deep scratches as any surface defects will be very noticeable on the finished product. it improves corrosion resistance. The polishing eradicates crevices where corrosive particles can lodge themselves

MATERIAL - AISI 304 STAINLESS STEEL
A choice stainless steel ideal for aggressive environments where combustion emissions can cause serious chemical corrosion on other types of metal

MAIN PIPE DIMENSION - 65mm
This is the diameter in mm of the main pipe of the exhaust 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
Special Order item
99761313100FMH
Product Information
Product Information
This is the switch required for the original Porsche sport exhaust Cars WITH "PASM" electronic damper control

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


Fits:
Cars WITH "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.

99761313100FMH
99761312900
99761312900FMH
99761313100
99761313100FMH

The product you are viewing cross references to these numbers
9996001111
Product Information
Product Information
Switch set for sound valves.

designtek

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
DISPLAYING 1 to 8 (of 8 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       

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