All Silencers / Mufflers

Transform your Porsche GT4 RS or Spyder RS with Fabspeed’s Valved X-Pipe Exhaust System—a perfect blend of power, sound, and precision engineering.

Fits: 
Porsche 718 (982) Cayman GT4 RS 2022>>
Porsche 718 (982) Boxster Spyder RS 2023>>

Sound & Performance:
- Our X-Pipe design merges the engine's two exhaust banks for an intoxicating 9,000 RPM symphony, offering a significant increase in volume over the stock system.
- Retains the factory PSE (Porsche Sport Exhaust) functionality, allowing you to quiet the exhaust note at will—ideal for those seeking both performance and comfort.
- Adds +7.5HP (+6.2HP at the rear wheels) at 8,100 RPM and +11 ft/lbs of torque at 3,500 RPM.
- Saves 10 lbs (5kg) compared to the factory system for a lighter, faster ride. 
- Helmholtz Technology eliminates drone for a pure driving experience with no unwanted noise frequencies.
- Investment cast X-Pipe for superior exhaust scavenging, defeating resonance and maximizing power output.

Perfect Fit & Design:
- Constructed from aerospace-grade titanium for lightweight durability, with mandrel-bent tubing for optimal flow.
- Laser scanned and CAD designed for a perfect OEM fit.
- 100% bolt-on, simple DIY installation with included hardware and online video guide.
- Helical Limited exhaust valves—imported from the UK and used by the world's top brands like Ferrari, McLaren, and Porsche—ensure maximum reliability.

Emissions Legal:
- This cat-back system is emissions legal in all 50 states and the rest of the world (ROW).
- No check engine light guaranteed!

Why Choose Fabspeed? 

At Fabspeed, we engineer every system in-house—no outsourcing like other brands. Our development process includes extensive 3D scanning, dyno testing, and multiple revisions to ensure the best possible product. With over 30 years of experience, we pride ourselves on producing the highest-quality, performance-boosting exhaust systems for Porsche vehicles. 

Fabspeed guarantees that our GT4 RS Valved X-Pipe Exhaust System will provide the best sound, the most reliable performance, and the greatest power increase on the market. We use only the finest components, backed by our lifetime warranty for peace of mind.

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Related, superseded, cross reference or alternative numbers for comparison.

FSPOR718GT4RSVLV

The product you are viewing cross references to these numbers

Milltek Full System with HJS 200CPSI Sports Cat & Burnt Titanium GT-100 Trims.
Pipe diameter - 63.50mm
NOTE: CAT SECTION FITS GPF MODELS ONLY

Fits:
Porsche 718 Boxster GTS 2.5ltr - 2016 to 2020
Porsche 718 Cayman GTS 2.5ltr - 2016 to 2020


Parts Assembly:
MSPO256: High Flow Sports Catalytic Converter
MSPO257: Connecting Pipe
MSPO251: LH Front Connecting Pipe
MSPO252: RH Front Connecting Pipe
MSPO253: LH Rear Connecting Pipe
MSPO254: RH Rear Connecting Pipe
MSPO255: Rear Silencer Balance Pipe
MSTIP194 x2: Burnt Titanium GT-100 Trims

Milltek Full System with HJS 200CPSI Sports Cat & Carbon JET-100 Trims.
Pipe diameter - 63.50mm
NOTE: CAT SECTION FITS GPF MODELS ONLY

Fits:
Porsche 718 Boxster GTS 2.5ltr - 2016 to 2020
Porsche 718 Cayman GTS 2.5ltr - 2016 to 2020

Parts Assembly:
MSPO256: High Flow Sports Catalytic Converter
MSPO257: Connecting Pipe
MSPO251: LH Front Connecting Pipe
MSPO252: RH Front Connecting Pipe
MSPO253: LH Rear Connecting Pipe
MSPO254: RH Rear Connecting Pipe
MSPO255: Rear Silencer Balance Pipe
MSTIP226 x2: Carbon Jet GT-100 Trims

Milltek Full System with HJS 200CPSI Sports Cat & Cerakote Black GT-100 Trims.
Pipe diameter - 63.50mm
NOTE: CAT SECTION FITS GPF MODELS ONLY

Fits:
Porsche 718 Boxster GTS 2.5 ltr - 2016 to 2020
Porsche 718 Cayman GTS 2.5ltr - 2016 to 2020

Parts Assembly:
MSPO256: High Flow Sports Catalytic Converter
MSPO257: Connecting Pipe
MSPO251: LH Front Connecting Pipe
MSPO252: RH Front Connecting Pipe
MSPO253: LH Rear Connecting Pipe
MSPO254: RH Rear Connecting Pipe
MSPO255: Rear Silencer Balance Pipe
MSVW372 x2: Cerakote Black Tips GT-100 Trims

Milltek Full Exhaust System with HJS 200CPSI Sports Catalytic Converter and  polished GT-100 tailpipe trims.
Pipe diameter - 63.50mm
NOTE: CAT SECTION FITS GPF MODELS ONLY

Fits:
Porsche 718 Boxster GTS 2.5ltr - 2016 to 2020
Porsche 718 Cayman GTS 2.5ltr - 2016 to 2020

Parts Assembly:
MSPO256: High Flow Sports Catalytic Converter
MSPO257: Connecting Pipe
MSPO251: LH Front Connecting Pipe
MSPO252: RH Front Connecting Pipe
MSPO253: LH Rear Connecting Pipe
MSPO254: RH Rear Connecting Pipe
MSPO255: Rear Silencer Balance Pipe
MSVW373 x2: Polished GT-100 Trims

Milltek Full System with HJS 200CPSI Sports Cat & Titanium GT-100 Trims
Pipe diameter - 63.50mm
NOTE: CAT SECTION FITS GPF MODELS ONLY

Fits:
Porsche 718 Boxster GTS 2.5ltr - 2016 to 2020
Porsche 718 Cayman GTS 2.5ltr - 2016 to 2020

Parts Assembly:
MSPO256: High Flow Sports Catalytic Converter
MSPO257: Connecting Pipe
MSPO251: LH Front Connecting Pipe
MSPO252: RH Front Connecting Pipe
MSPO253: LH Rear Connecting Pipe
MSPO254: RH Rear Connecting Pipe
MSPO255: Rear Silencer Balance Pipe
MSVW374 x2: Titanium Tips GT-100 Trims

Milltek GPF bypass sports exhaust with burnt titanium GT-115 tailpipe trims.

Post Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 - 2020 Onwards
Porsche 718 Boxster GTS 4.0ltr - 2020 Onwards

Exhaust System with GPF (gasoline particulate filter) delete
Pipe diameter - 60.30mm

Parts Assembly:
MSPO258: LH GPF Bypass
MSPO259: RH GPF Bypass
MSPO269: LH Valve Assembly
MSPO270: LH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO271: LH Mounting Bracket
MSPO272: RH Mounting Bracket
MSPO263 x2: Outlet Pipes
MSTIP253 x2: 4.5" Tailpipe Trim Burnt Titanium

Requires Stage 2 ECU Software update

Milltek GPF bypass sports exhaust with cerakote black GT-115 tailpipe trims.

Post Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 - 2020 Onwards
Porsche 718 Boxster GTS 4.0ltr - 2020 Onwards

Exhaust System with GPF (gasoline particulate filter) delete
Pipe diameter - 60.30mm

Parts Assembly:
MSPO258: LH GPF Bypass
MSPO259: RH GPF Bypass
MSPO269: LH Valve Assembly
MSPO270: LH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO271: LH Mounting Bracket
MSPO272: RH Mounting Bracket
MSPO263 x2: Outlet Pipes
MSTIP251 x2: 4.5" Tailpipe Trim Cerakote Black

Requires Stage 2 ECU Software update

Milltek GPF bypass sports exhaust with jet carbon GT-115 tailpipe trims.

Post Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 - 2020 Onwards
Porsche 718 Boxster GTS 4.0ltr - 2020 Onwards

Exhaust System with GPF (gasoline particulate filter) delete
Pipe diameter - 60.30mm

Parts Assembly:
MSPO258: LH GPF Bypass
MSPO259: RH GPF Bypass
MSPO269: LH Valve Assembly
MSPO270: LH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO271: LH Mounting Bracket
MSPO272: RH Mounting Bracket
MSPO263 x2: Outlet Pipes
MSTIP244 x2: 4.5" Tailpipe Trim Jet-115 Carbon

Requires Stage 2 ECU Software update

Milltek GPF bypass sports exhaust with polished GT-115 tailpipe trims.

Post Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 - 2020 Onwards
Porsche 718 Boxster GTS 4.0ltr - 2020 Onwards

Exhaust System with GPF (gasoline particulate filter) delete
Pipe diameter - 60.30mm

Parts Assembly:
MSPO258: LH GPF Bypass
MSPO259: RH GPF Bypass
MSPO269: LH Valve Assembly
MSPO270: LH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO271: LH Mounting Bracket
MSPO272: RH Mounting Bracket
MSPO263 x2: Outlet Pipes
MSTIP250 x2: 4.5" Tailpipe Trim Polished

Requires Stage 2 ECU Software update

Milltek GPF bypass sports exhaust with titanium GT-115 tailpipe trims.

Post Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 - 2020 Onwards
Porsche 718 Boxster GTS 4.0ltr - 2020 Onwards

Exhaust System with GPF (gasoline particulate filter) delete
Pipe diameter - 60.30mm

Parts Assembly:
MSPO258: LH GPF Bypass
MSPO259: RH GPF Bypass
MSPO269: LH Valve Assembly
MSPO270: LH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO271: LH Mounting Bracket
MSPO272: RH Mounting Bracket
MSPO263 x2: Outlet Pipes
MSTIP252 x2: 4.5" Tailpipe Trim Titanium

Requires Stage 2 ECU Software update

The Milltek GPF-Back Exhaust System redefines your driving experience. By replacing your factory exhaust with Milltek's wider, precision-engineered pipework, you'll experience a sharper throttle response, improved engine efficiency, and a striking aesthetic that complements your vehicle’s high-performance nature. 

Fits:
Porsche 718 Cayman GT4 - Only for OPF/GPF equipped vehicles with Porsche's PDK transmission*
Porsche 718 Boxster Spyder - Only for OPF/GPF equipped vehicles with Porsche's PDK transmission*
Porsche 718 Cayman GTS 4.0L - Only for OPF/GPF equipped vehicles with Porsche's PDK transmission*
Porsche 718 Boxster GTS 4.0L - Only for OPF/GPF equipped vehicles with Porsche's PDK transmission*

NOTE: This system is compatible exclusively with 718 models that feature a petrol particulate filter (PPF) and Porsche's PDK transmission. PPFs were installed on 718 models manufactured after February 2020. If you are uncertain whether your vehicle is equipped with a PPF, please feel free to contact us with your VIN number for confirmation.

Why purchase a Milltek sport exhaust?

Sharper Throttle Response...
Enjoy quicker engine response with optimized airflow and enhanced performance, improving the overall driving experience.

Substantial Weight Savings... 
Lighter than the original exhaust system, reducing overall weight for improved agility and handling.

Premium T304L Aircraft-Grade Stainless Steel... 
Built from anti-magnetic, high-quality stainless steel that resists discoloration, offering excellent durability and performance.

Mandrel Bending for Better Gas Flow... 
The system uses mandrel bending for full-flow bends, allowing exhaust gases to flow freely and boosting engine efficiency without sacrificing mid-range torque.

Lifetime Guarantee... 
Milltek systems come with a lifetime guarantee for the original purchaser, offering peace of mind. (Excludes cats and flexes)

Designed and Manufactured in the UK...
Since 1983, Milltek has been designing and building exhaust systems with over 40 years of technical expertise, ensuring the highest quality and precision.

Ever-Expanding Range of Performance Exhausts... 
Milltek offers a continuously expanding selection of exhaust systems tailored for performance vehicles like your Porsche.

--Pipe diameter equals 60.3mm / 2.37 inches.
--Please note that this product does not have official certification for use in Europe.

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

SSXPO193

The product you are viewing cross references to these numbers

Milltek sports exhaust from gas particulate filter backwards with Burnt Titanium GT-115 Trims

Pre Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 4.0ltr - 2019 to 2020
Porsche 718 Boxster GTS 4.0ltr - 2019 to 2020
Only for cars with Gas Particulate Filter (GPF)

Sports Exhaust System from Gas Particulate Filter (GPF) back
Pipe diameter - 60.30mm

Parts Assembly:
MSPO260: LH Valve Assembly
MSPO261: RH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO263 x2: Outlet Pipes
MSTIP253 x2: 4.5" Tailpipe Trim Burnt Titanium (115 GT)

Milltek sports exhaust from gas particulate filter backwards with Carbon Jet GT-115 Trims

Pre Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 4.0ltr - 2019 to 2020
Porsche 718 Boxster GTS 4.0ltr - 2019 to 2020
Only for cars with Gas Particulate Filter (GPF)

Sports Exhaust System from Gas Particulate Filter (GPF) back
Pipe diameter - 60.30mm

Parts Assembly:
MSPO260: LH Valve Assembly
MSPO261: RH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO263 x2: Outlet Pipes
MSTIP244 x2: 4.5" Tailpipe Trim Carbon Jet (115 GT)

Milltek sports exhaust from gas particulate filter backwards with Cerakote Black GT-115 Trims

Pre Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 4.0ltr - 2019 to 2020
Only for cars with Gas Particulate Filter (GPF)

Sports Exhaust System from Gas Particulate Filter (GPF) back
Pipe diameter - 60.30mm

Parts Assembly:
MSPO260: LH Valve Assembly
MSPO261: RH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO263 x2: Outlet Pipes
MSTIP251 x2: 4.5" Tailpipe Trim Cerakote Black (115 GT)

Requires Stage 2 ECU Software update

Milltek sports exhaust from gas particulate filter backwards with Polished GT-115 Trims

Pre Feb 2020 build only



Fits:
Porsche 718 Cayman GT4 4.0ltr - 2019 to 2020
Only for cars with Gas Particulate Filter (GPF)

Sports Exhaust System from Gas Particulate Filter (GPF) back
Pipe diameter - 60.30mm

Parts Assembly:
MSPO260: LH Valve Assembly
MSPO261: RH Valve Assembly
MSPO262: Rear Silencer Assembly
MSPO263 x2: Outlet Pipes
MSTIP250 x2: 4.5" Tailpipe Trim Polished (115 GT)