Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
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
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 718 2.0L Manual (300 Bhp)
- Porsche Boxster 718 2.0L PDK (300 Bhp)
- Porsche Boxster S 718 2.5L Manual (350 Bhp)
- Porsche Boxster S 718 2.5L PDK (350 Bhp)
- Porsche Boxster T 718 2.0L Manual (300 Bhp)
- Porsche Boxster T 718 2.0L PDK (300 Bhp)
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp)
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp)
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 991.1 Carrera C2 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560Bhp) 2014-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman 718 2.0L Manual (300Bhp)
- Porsche Cayman 718 2.0L PDK (300Bhp)
- Porsche Cayman S 718 2.5L Manual (350Bhp)
- Porsche Cayman S 718 2.5L PDK (350Bhp)
- Porsche Cayman T 718 2.0L Manual (300Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)

Fits:
All Porsche models with vacuum operated valvetronic exhaust systems
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9996001111
The product you are viewing cross references to these numbers
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