Cat. converter w/ petrol part filter Genuine Porsche part 9GT254351B

9m GPF delete exhaust pipe set. 
Sold as a pair - left and right

Fits:

Porsche 718 Cayman GT4 RS - 2023 Onwards

9m 718 Cayman GT4RS

• Deletes restrictive GPF pipes
• Much better exhaust sound
• Faster acceleration 
• 50% weight saving
• Reduced radiant heat on the inside of the rear tyres
• Minimum gains of 30hp+

Please Note
European cars will require our 9m ECU remap to avoid engine warning light

Click 'Zoom in' for large parts diagram.
Diagram ref no 13 and 14

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Related, superseded, cross reference or alternative numbers for comparison.

9M9GT254351B

The product you are viewing cross references to these numbers

9m GPF delete exhaust pipe set. 
Sold as a pair - left and right

Fits:
Porsche 718 Boxster Spyder RS - 2023 Onwards

9m 718 Boxster Spyder RS

• Deletes restrictive GPF pipes
• Much better exhaust sound
• Faster acceleration 
• 50% weight saving
• Reduced radiant heat on the inside of the rear tyres
• Minimum gains of 30hp+

Please Note
European cars will require our 9m ECU remap to avoid engine warning light

Click 'Zoom in' for large parts diagram.
Diagram ref no 13 and 14

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Related, superseded, cross reference or alternative numbers for comparison.

9M9GT254351CKIT

The product you are viewing cross references to these numbers

9m Resonated GPF delete exhaust pipe set. 
Sold as a pair - left and right

Fits:
Porsche 718 Boxster Spyder RS - 2023 Onwards

9m 718 Boxster Spyder RS

• Deletes restrictive GPF pipes
• Much better exhaust sound
• Faster acceleration 
• 50% weight saving
• Reduced radiant heat on the inside of the rear tyres
• Minimum gains of 30hp+

Please Note
European cars will require our 9m ECU remap to avoid engine warning light

Click 'Zoom in' for large parts diagram.
Diagram ref no 13 and 14

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Related, superseded, cross reference or alternative numbers for comparison.

9M9GT254351BR

The product you are viewing cross references to these numbers

9m Resonated GPF delete exhaust pipe set. 
Sold as a pair - left and right

Fits:

Porsche 718 Cayman GT4 RS - 2023 Onwards

9m 718 Cayman GT4RS

• Deletes restrictive GPF pipes
• Much better exhaust sound
• Faster acceleration 
• 50% weight saving
• Reduced radiant heat on the inside of the rear tyres
• Minimum gains of 30hp+

Please Note
European cars will require our 9m ECU remap to avoid engine warning light

Click 'Zoom in' for large parts diagram.
Diagram ref no 13 and 14

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

9MGT254351CR

The product you are viewing cross references to these numbers

Akrapovic Link Pipe Set (Titanium).

Fits:
Porsche 718 Cayman GT4 RS / Boxster Spyder RS 2022 - 2024

Link pipe set (Titanium) was tested and developed together with Slip-On Race Line (Titanium) system.

Fabricated using high-grade titanium and insulated with stainless steel, the front part is cast in the in-house foundry and shaped to provide correct clearance of the stock shocks. The sport 200 cpsi catalytic converters are integrated and have extra insulation for heat protection. For non-OPF cars, a new plug is included to disable the EGT sensor. It weighs in at 4.9 kg (38.9%) less than the stock system. Installed with the Slip-On Race Line (Titanium), power gains of 19.5 kW (26.5 hp) at 4,950 rpm and torque increases of 38.1 Nm at 4,900 rpm have been recorded on the Akrapovič dyno when tested against a Porsche 718 Cayman GT4 RS with a standard stock exhaust. Due to more direct gas flow, the sound has a true racing quality with high-frequency tones. This track-oriented part has been developed for use on closed-course competition circuits only, and when installed remapping is mandatory. A further upgrade is available with the installation of the optional Evolution Header Set (Titanium).

This product fits on OPF and NON-OPF vehicles.

THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.

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

L-PO

The product you are viewing cross references to these numbers

Titanium Ceramic-Coated Resonated OPF Delete Pipes with Resonator for Porsche 718 Cayman GT4 RS – Maximum Sound, Performance & Weight Reduction

These titanium ceramic-coated resonated OPF delete pipes are engineered specifically for the Porsche 718 Cayman GT4 RS, delivering a significant performance and acoustic upgrade over the standard-fit exhaust configuration. Designed to replace the restrictive petrol particulate filter (OPF/GPF) sections, this system dramatically improves exhaust flow while maintaining refined sound control through resonated construction.

Fits:

• Porsche Cayman GT4 RS 718 4.0L

Manufactured from high-grade titanium and finished with a ceramic heat-resistant coating, these pipes offer exceptional strength, extreme weight reduction and reduced radiant heat transfer—particularly beneficial around the rear tyres during aggressive road or track use.

What is a Resonator

An exhaust resonator refines exhaust sound by cancelling unwanted frequencies such as drone and rasp. Positioned between the catalytic converter and muffler, it shapes tone rather than reducing volume, creating a smoother, more controlled exhaust note

What These OPF Delete Pipes Do

This performance exhaust upgrade:

• Removes restrictive OPF/GPF sections from the exhaust system
  
• Improves exhaust gas flow, allowing the engine to breathe freely
  
• Delivers a more exotic, motorsport-inspired exhaust note
• Enhances throttle response and acceleration
• Reduces exhaust system weight dramatically
• Lowers radiant heat build-up in the rear wheel area

Designed for drivers seeking maximum engagement, performance and sound from their Spyder RS.

Why Standard OPF Exhaust Sections Restrict Performance

Standard-fit OPF exhaust components are designed primarily for emissions compliance and often cause:

Excessive exhaust back pressure Reduced power and throttle response Muted exhaust sound High exhaust system weight Increased heat retention near the rear axle

On high-revving RS models, these restrictions significantly limit the engine’s true potential.

Why These Titanium OPF Delete Pipes Should Be Fitted

Replacing the original OPF sections with this titanium system provides:

• Minimum gains of 30hp+ through improved exhaust flow
  
• Massive weight reduction Standard OPF pipe set: 13kg 9m titanium ceramic-coated pipes: 3.8kg Total saving: 9.2kg
• Sharper throttle response and faster acceleration
• Reduced thermal load around suspension and tyres
  
• Long-term durability thanks to titanium construction
  
• A refined yet aggressive exhaust tone due to resonated design

This upgrade transforms the driving character of the 718 Boxster Spyder RS.

Important Technical Note
European-spec vehicles require a compatible ECU calibration (such as the 9m ECU remap) to prevent an engine warning light after OPF removal.       

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

9MTIGT254351CR

The product you are viewing cross references to these numbers

Titanium Ceramic-Coated Resonated OPF Delete Pipes without Resonator for Porsche 718 Cayman GT4 RS – Maximum Sound, Performance & Weight Reduction

These titanium ceramic-coated resonated OPF delete pipes are engineered specifically for the Porsche 718 Cayman GT4 RS, delivering a significant performance and acoustic upgrade over the standard-fit exhaust configuration. Designed to replace the restrictive petrol particulate filter (OPF/GPF) sections, this system dramatically improves exhaust flow while maintaining refined sound control through resonated construction.

Fits:

• Porsche Cayman GT4 RS 718 4.0L

Manufactured from high-grade titanium and finished with a ceramic heat-resistant coating, these pipes offer exceptional strength, extreme weight reduction and reduced radiant heat transfer—particularly beneficial around the rear tyres during aggressive road or track use.

What is a Resonator

An exhaust resonator refines exhaust sound by cancelling unwanted frequencies such as drone and rasp. Positioned between the catalytic converter and muffler, it shapes tone rather than reducing volume, creating a smoother, more controlled exhaust note

What These OPF Delete Pipes Do

This performance exhaust upgrade:

• Removes restrictive OPF/GPF sections from the exhaust system
  
• Improves exhaust gas flow, allowing the engine to breathe freely
  
• Delivers a more exotic, motorsport-inspired exhaust note
• Enhances throttle response and acceleration
• Reduces exhaust system weight dramatically
• Lowers radiant heat build-up in the rear wheel area

Designed for drivers seeking maximum engagement, performance and sound from their Cayman GT4 RS.

Why Standard OPF Exhaust Sections Restrict Performance

Standard-fit OPF exhaust components are designed primarily for emissions compliance and often cause:

Excessive exhaust back pressure Reduced power and throttle response Muted exhaust sound High exhaust system weight Increased heat retention near the rear axle

On high-revving RS models, these restrictions significantly limit the engine’s true potential.

Why These Titanium OPF Delete Pipes Should Be Fitted

Replacing the original OPF sections with this titanium system provides:

• Minimum gains of 30hp+ through improved exhaust flow
  
• Massive weight reduction Standard OPF pipe set: 13kg 9m titanium ceramic-coated pipes: 3.8kg Total saving: 9.2kg
• Sharper throttle response and faster acceleration
• Reduced thermal load around suspension and tyres
  
• Long-term durability thanks to titanium construction
  
• A refined yet aggressive exhaust tone due to resonated design

This upgrade transforms the driving character of the 718 Cayman GT4 RS.

Important Technical Note
European-spec vehicles require a compatible ECU calibration (such as the 9m ECU remap) to prevent an engine warning light after OPF removal.       

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

9MTIGT254351C

The product you are viewing cross references to these numbers