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Porsche // 993 (911) (1994-1998) // 993 (911) TURBO 1994-96
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Valvetronic GT3 Muffler Conversion Kit. Porsche 981 Cayman GT4 / Spyder - FSPOR981GT4GT3CK
FSPOR981GT4GT3CK
Vehicle Group
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche Cayman GT4 3.8L 2015-16
Information
Valvetronic GT3 Muffler Conversion Kit.
Porsche Boxster Cayman owners have requested a conversion kit that allows the installation of a Porsche OEM 991 GT3 center muffler onto their cars. Fabspeed Motorsport listened and designed in CAD and built inhouse a lightweight installation kit that allows any 6 speed Porsche 981 GT4 or Spyder owner to install an OEM GT3 center muffler (A PDK version will also be available once we are able to test fitment). This kit also allows the installation of a Fabspeed 991 GT3 Center Muffler Bypass Pipe or 991 GT3 Center Mini Maxflo Performance Exhaust onto your 981 GT4/Spyder.
The system consists of 2.5" 63.5mm CNC mandrel bent one piece Left and Right side over axle pipes and clamps. Then a set of valved side muffler inlet Y-pipes that retain the factory PSE valved exhaust functionality. The valves are OEM Porsche GT3 HELICAL vacuum-actuated exhaust valves that are imported from the U.K. We use our FLOW Waterjet to cut a CAD designed, lightweight, stainless steel mounting bracket to hold the muffler; hardware for installation is included. This and the Factory Porsche muffler band straps hold everything in place. For tips, you can use the factory 991 GT3 tips or you can order our custom exhaust tip mount with any choice of our signature tips.
SOUND: Enjoy the characteristic sound of a factory Porsche engineered exhaust but with a nice increase in volume! With PSE off (valves closed), the exhaust is still tame and livable in the cabin. However, with PSE on (valves open) hear that flat 6 howl up to redline! The larger over axle pipes that are included also contribute to the overall louder tone.
POWER: The 991 GT3 muffler was designed by Porsche to support 475 HP, because of this it flows a lot better than the 981 GT4 muffler that was only designed for 385 HP. We expect this increase in flow, helped by our larger over axle pipes and muffler inlets, to give a nice HP increase.
FEATURES:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR981GT4GT3CK
The product you are viewing cross references to these numbers
Porsche Boxster Cayman owners have requested a conversion kit that allows the installation of a Porsche OEM 991 GT3 center muffler onto their cars. Fabspeed Motorsport listened and designed in CAD and built inhouse a lightweight installation kit that allows any 6 speed Porsche 981 GT4 or Spyder owner to install an OEM GT3 center muffler (A PDK version will also be available once we are able to test fitment). This kit also allows the installation of a Fabspeed 991 GT3 Center Muffler Bypass Pipe or 991 GT3 Center Mini Maxflo Performance Exhaust onto your 981 GT4/Spyder.
The system consists of 2.5" 63.5mm CNC mandrel bent one piece Left and Right side over axle pipes and clamps. Then a set of valved side muffler inlet Y-pipes that retain the factory PSE valved exhaust functionality. The valves are OEM Porsche GT3 HELICAL vacuum-actuated exhaust valves that are imported from the U.K. We use our FLOW Waterjet to cut a CAD designed, lightweight, stainless steel mounting bracket to hold the muffler; hardware for installation is included. This and the Factory Porsche muffler band straps hold everything in place. For tips, you can use the factory 991 GT3 tips or you can order our custom exhaust tip mount with any choice of our signature tips.
SOUND: Enjoy the characteristic sound of a factory Porsche engineered exhaust but with a nice increase in volume! With PSE off (valves closed), the exhaust is still tame and livable in the cabin. However, with PSE on (valves open) hear that flat 6 howl up to redline! The larger over axle pipes that are included also contribute to the overall louder tone.
POWER: The 991 GT3 muffler was designed by Porsche to support 475 HP, because of this it flows a lot better than the 981 GT4 muffler that was only designed for 385 HP. We expect this increase in flow, helped by our larger over axle pipes and muffler inlets, to give a nice HP increase.
FEATURES:
- Fits all 6 speed manual Porsche 981 Cayman GT4 / 981 Boxster Spyder vehicles (2015-2016). A PDK version will also be available once we are able to test fitment
- Choose between your choice of Premium Fabspeed Exhaust Tips or use OEM 991 GT3 Tips.
- CNC Mandrel bent 2.5" 63.5 precision over axle pipes to valvetronic inlet pipes
- Helical Aerospace United Kingdom exhaust valves- same OEM quality valves used on Porsche GT3, GT3RS. Made with Silica carbide.
- Constructed from 14-16ga T304L stainless steel tubing for maximum power and durability
- Direct bolt-on installation; no cutting or welding required
- All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty.
NOTE: OEM GT3 center muffler is NOT included
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR981GT4GT3CK
98111192106
98111192206
The product you are viewing cross references to these numbers
Prices from: £2,009.71
Related products
Vehicle Group
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Information
Fabspeed's Supercup Exhaust System for the Porsche 993 Turbo provides a throaty sports car sound with significant power improvements.
FEATURES:
• Fits all Porsche 993 Turbo / Turbo S vehicles (1995-1998)
• Noticeably increases horsepower by 15 whp
• Saves 20lbs from the rear of the vehicle
• Includes Fabspeed Single Wall Tips: Available in different finishes from the drop down below.
• 2.5" tubing throughout vs. 2.18" factory tubing
• 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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR993TSCUP
The product you are viewing cross references to these numbers
FEATURES:
• Fits all Porsche 993 Turbo / Turbo S vehicles (1995-1998)
• Noticeably increases horsepower by 15 whp
• Saves 20lbs from the rear of the vehicle
• Includes Fabspeed Single Wall Tips: Available in different finishes from the drop down below.
• 2.5" tubing throughout vs. 2.18" factory tubing
• 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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR993TSCUP
99311104554
99311104555
99311104654
99311104655
The product you are viewing cross references to these numbers
Prices from: £1,309.71
Vehicle Group
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Information
Fabspeed Modular cat bypass x-pipe Competition ONLY.
Replaces the restrictive factory catalytic converters with much less restrictive straight-through pipes for maximum flow and performance.
FEATURES:
• Fits all Porsche 993 Turbo / Turbo S vehicles worldwide (1995-1998)
• Fabspeed's Primary Catbypass Pipes replace the restrictive factory catalytic converters with much less restrictive straight-through pipes for maximum flow and performance.
• Noticeable increase in power and improved throttle response
• Saves 12 lbs from the rear of the vehicle
• Adds an aggressive exhaust note for exotic high-performance sound
• Direct bolt-on replacement for the heavy factory catalytic converters on the 993 Turbo
• Constructed from polished T304L stainless steel
• Optional 02 spacers available to help prevent triggering the Check Engine Light
• All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty
DISCLAIMER: This product removes the OEM intake filter system from the vehicle, and as such, is strictly intended for closed track events and off-road use only. This product contains a High-Flow Air Filter solely intended for track and race cars as it is NOT California Air Resources Board Certified (CARB) and not EPA certified. You are hereby informed and warned to check your local, state, and federal laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.
DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only, never to be driven on public roads. This product is or contains a Racing Cat Bypass Pipe, which will give you check engine lights on OBD2 cars. Racing Cat Bypass Pipes are solely intended for track and race cars as they are NOT California Air Resources Board Certified (CARB) and not EPA certified. You are hereby informed and warned to check your local, state, and federal laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.
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: In the United Kingdom, 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. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.
If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR993TCBX
The product you are viewing cross references to these numbers
Replaces the restrictive factory catalytic converters with much less restrictive straight-through pipes for maximum flow and performance.
FEATURES:
• Fits all Porsche 993 Turbo / Turbo S vehicles worldwide (1995-1998)
• Fabspeed's Primary Catbypass Pipes replace the restrictive factory catalytic converters with much less restrictive straight-through pipes for maximum flow and performance.
• Noticeable increase in power and improved throttle response
• Saves 12 lbs from the rear of the vehicle
• Adds an aggressive exhaust note for exotic high-performance sound
• Direct bolt-on replacement for the heavy factory catalytic converters on the 993 Turbo
• Constructed from polished T304L stainless steel
• Optional 02 spacers available to help prevent triggering the Check Engine Light
• All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty
DISCLAIMER: This product removes the OEM intake filter system from the vehicle, and as such, is strictly intended for closed track events and off-road use only. This product contains a High-Flow Air Filter solely intended for track and race cars as it is NOT California Air Resources Board Certified (CARB) and not EPA certified. You are hereby informed and warned to check your local, state, and federal laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.
DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only, never to be driven on public roads. This product is or contains a Racing Cat Bypass Pipe, which will give you check engine lights on OBD2 cars. Racing Cat Bypass Pipes are solely intended for track and race cars as they are NOT California Air Resources Board Certified (CARB) and not EPA certified. You are hereby informed and warned to check your local, state, and federal laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.
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: In the United Kingdom, 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. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age. The vehicle must still pass an MOT test.
If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR993TCBX
99311321357
99311221358
99311321359
99311321457
99311321458
99311321459
The product you are viewing cross references to these numbers
Price: £2,814.24
Orderable
Vehicle Group
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Information
Exhaust Sport Cat X- Pipe.
High performance free-flowing X-Pipe replaces the heavy and restrictive factory muffler for improved power and sound.
Please note:
This product is currently undergoing a design update and will be available for purchase soon. Please contact us for details.
FEATURES:
• Fits all Porsche 993 Turbo / Turbo S vehicles (1995-1998)
• Improves power and throttle response
• Saves 8 lbs from the rear of the vehicle
• Constructed from high-quality 14-16 gauge C.N.C. mandrel-bent T304L stainless steel for optimum flow and maximum durability
• Direct bolt-on replacement for restrictive factory muffler
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty
NOTE: Fabspeed's 200-cell high-flow catalytic converters are not C.A.R.B. certified and are for Off-Road Use ONLY in the state of California
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: In the United Kingdom, 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. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age.
The vehicle must still pass an MOT test. If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR993TSCX
The product you are viewing cross references to these numbers
High performance free-flowing X-Pipe replaces the heavy and restrictive factory muffler for improved power and sound.
Please note:
This product is currently undergoing a design update and will be available for purchase soon. Please contact us for details.
FEATURES:
• Fits all Porsche 993 Turbo / Turbo S vehicles (1995-1998)
• Improves power and throttle response
• Saves 8 lbs from the rear of the vehicle
• Constructed from high-quality 14-16 gauge C.N.C. mandrel-bent T304L stainless steel for optimum flow and maximum durability
• Direct bolt-on replacement for restrictive factory muffler
• All Fabspeed performance products are backed by the Fabspeed Lifetime Limited Warranty
NOTE: Fabspeed's 200-cell high-flow catalytic converters are not C.A.R.B. certified and are for Off-Road Use ONLY in the state of California
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: In the United Kingdom, 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. They are not MOT compliant and cannot be used on public roads. These components are intended solely for race and track use.
For vehicles manufactured before 1st March 2001, a non-type approved sports catalytic converter may be fitted, provided it offers comparable performance to the original and the vehicle continues to meet the applicable emissions standards for its age.
The vehicle must still pass an MOT test. If you are located outside the UK, please check your local laws and regulations to ensure compliance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FSPOR993TSCX
99311321357
99311221358
99311321359
99311321457
99311321458
99311321459
The product you are viewing cross references to these numbers
Price: £5,746.47
Orderable
.jpg?width=197 "Fabspeed Single Wall Oval Bolt-On Tips. Porsche 993 C2S / C4S 1994-1998 (Wide Body) - FS.POR.993.SWOTW, FS.POR.993.SWOTWBBR, FS.POR.993.SWOTWBP, FS.POR.993.SWOTWBB, 9311125157, 9311125152, 99311198102, 99311198202, 99322093903S, 99311125156, 99311125257, 99311125151, 99311125251 - FS.POR.993.SWOTW, FS.POR.993.SWOTWBBR, FS.POR.993.SWOTWBP, FS.POR.993.SWOTWBB")
.jpg){kind=link}
Vehicle Group
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
Information
Fabspeed Single Wall Oval Bolt-On Tips. Porsche 993 C2S / C4S 1994-1998 (Wide Body)
Upgrade the rear aesthetic of your 993 Carrera wide-body with these premium bolt-on oval exhaust tips. Designed specifically for the wide-body 1994-1998 models (C2S / C4S), these single-wall, slash-cut tips are crafted from high-grade T304L stainless steel and come in various finishes (polished stainless steel, brushed stainless steel, satin black). Installation is direct bolt-on – no welding required – retaining OEM mounting hardware.
Fits:
What This Product Does:
Fitment & Considerations:
Why These Upgrades Matter:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FS.POR.993.SWOTW
The product you are viewing cross references to these numbers
Upgrade the rear aesthetic of your 993 Carrera wide-body with these premium bolt-on oval exhaust tips. Designed specifically for the wide-body 1994-1998 models (C2S / C4S), these single-wall, slash-cut tips are crafted from high-grade T304L stainless steel and come in various finishes (polished stainless steel, brushed stainless steel, satin black). Installation is direct bolt-on – no welding required – retaining OEM mounting hardware.
Fits:
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
What This Product Does:
- These tips replace the factory exhaust outlet tips on your 993 wide-body, delivering a refined, upgraded rear-end aesthetic: an oval single-wall slash-cut design that enhances the visual presence.
- While the performance change may be minimal (since they are tips rather than a full exhaust system), the finish, build quality and fitment elevate the appearance and help maintain corrosion resistance and durability of the outlet area.
- The “bolt-on” nature of the tips means installation is relatively straightforward compared to full exhaust system upgrades — an attractive feature for builders/restorers.
Fitment & Considerations:
- Ensure your car is the wide-body 993 version (C2S, C4S) — the narrow body vs wide body distinction affects tip size/clearance/appearance.
- Choose your finish carefully (polished, brushed, black) to match your rear bumper and overall aesthetic.
- When installing, reuse the factory ball-joint clamps/donuts to secure proper fitment.
- Double-check clearance of the tips relative to the bumper, especially aftermarket or modified bumpers.
Why These Upgrades Matter:
- Wide-body 993 Carreras (C2S, C4S) have a different rear bumper/exhaust exit configuration compared to narrow-body versions; this version of the tips is sized and styled for the wide-body variant, ensuring proper proportions and fitment.
- If your factory tips are worn, corroded, mismatched or simply not matching your build aesthetic, these tips offer a high-quality, stylish solution.
- For restoration or upgrade projects, choosing a trusted brand like Fabspeed aligns with performance-brand hardware and can support build quality perception.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
FS.POR.993.SWOTW
FS.POR.993.SWOTW
FS.POR.993.SWOTWBBR
FS.POR.993.SWOTWBP
FS.POR.993.SWOTWBB
9311125157
9311125152
99311198102
99311198202
99322093903S
99311125156
99311125257
99311125151
99311125251
The product you are viewing cross references to these numbers
Prices from: £351.56