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Side Muffler Bypass Pipes. Porsche 991.2 GT3 / GT3 RS ❭ FSPOR9912GT3SMB
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19

Optimized design that replaces the heavy and restrictive factory side mufflers for improved exhaust flow, increased sound and weight savings.
Utilizing premium Helical valves along with the addition of O2 bungs, Fabspeed's Side Muffler Bypass Pipes provide the ultimate track solution for the 991.2 GT3 / GT3 RS. When accompanied with our new Long Tube Competition Headers, our Side Muffler Bypass Pipes allow the maximum amount of exhaust flow possible from the 991.2 GT3 / GT3 RS engine.
HELICAL VALVES
We chose to use Helical Valves on our 991.2 GT3 / GT3 RS track exhaust systems for their unprecedented quality - which have been proven by many OEM manufacturers such as McLaren, Ferrari, Lamborghini, and many more. Helical valves are an integral part of our Side Muffler Bypass pipes, opening and closing with precision to control the gas flow and optimizing engine back-pressure for improved performance. Helical's extensive experience in high-volume OEM automotive applications has led to standard features such as an extremely durable pneumatic actuator, precision flat sealing faces inside the valve, stiffening ribs and high-temperature bearings at both ends of the butterfly spindle.
O2 BUNGS
We relocated the O2 bungs from the collector of the headers to the Side Muffler Bypass Pipes in order to maintain factory-like functionality with our Long Tube Competition Headers - allowing them to read all cylinders while maximizing the performance of the collector. This design will replace our existing SMBP's allowing you to upgrade to our Long Tube Race Header design at any time in the future.
FEATURES:
• Fits all Porsche 991.2 GT3 / GT3 RS vehicles (2017+)
• Highest quality Helical valves
• Includes O2 bungs for factory like functionality when paired with Fabspeed Long Tube Competition Race Headers
• Saves 34 lbs from the rear of the vehicle
• Replicates aggressive CUP car sound for the street
14-16ga T304 Stainless Steel construction
• Simple bolt-on installation
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty.
Please note: This is a special-order item manufactured to order. In some cases, please allow 4 – 5 weeks for the delivery. Special order items cannot be cancelled from this supplier once your order has been placed.
NOTE: Sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001 in the United Kingdom. They are not MOT compliant and must not be used on public roads. These components are intended for race and track use only. If you are located outside the UK, please consult your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR9912GT3SMB
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Comes With Tailpipes Quad 100mm GT100, Stainless Steel.
Pipe Diameter: 2.76-inch (70.00mm)
Tailpipe: Quad 100mm GT100
Fits:
Porsche Cayenne 958 Turbo 4.8L V8 (Pre-Facelift) 2010>>2014
Parts Assembly:
MSPO224REP: LH Front Silencer Bypass Assembly
MSPO225REP: RH Front Silencer Bypass Assembly
MSPO226: LH Centre Connecting Pipe
MSPO227: RH Centre Connecting Pipe
MSPO228: Loose Mounting Bracket
MSPO229: LH Rear Silencer Assembly (no tip)
MSPO230: RH Rear Silencer Assembly (no tip)
MSPO231: x4 Cup Trim Assembly
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
SSXPO110
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Pipe Diameter: 2.76-inch (70.00mm)
Fits:
Porsche 958 Cayenne Turbo 4.8L V8 (Pre-Facelift) 2010>>2014
Parts Assembly:
MSPO224REP: LH Front Silencer Bypass Assembly
MSPO225REP: RH Front Silencer Bypass Assembly
MSPO226: LH Centre Connecting Pipe
MSPO227: RH Centre Connecting Pipe
MSPO228: Loose Mounting Bracket
MSPO229: LH Rear Silencer Assembly (NoTip)
MSPO230: RH Rear Silencer Assembly (No Tip)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
SSXPO108
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Pipe Diameter: 2.76-inch (70.00mm)
Tailpipe: Quad 100mm GT100
Fits:
Porsche Cayenne 958 Turbo 4.8L V8 (Pre-Facelift) 2010>>2014
Parts Assembly:
MSPO224: LH Front Silencer Bypass Assembly
MSPO225: RH Front Silencer Bypass Assembly
MSPO226: LH Centre Connecting Pipe
MSPO227: RH Centre Connecting Pipe
MSPO228: Loose Mounting Bracket
MSPO229: LH Rear Silencer Assembly (No Tip)
MSPO230: RH Rear Silencer Assembly (No Tip)
MSPO231: x4 Cup Trim Assembly
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
SSXPO111
The product you are viewing cross references to these numbers
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