Redstar's complete downpipes system for the 4.0-litre twin-turbo V8 pairs primary (top) downpipes with secondary downpipes that bypass the factory secondary catalytic converters. It suits the 2019-2024 Bentley Continental GT V8, 2020-2024 Flying Spur V8, 2025+ Continental GT / GTC Speed and Flying Spur Speed V8 Hybrid, Porsche Panamera 971 (2016-2023, including GTS and Turbo S E-Hybrid) and 2024+ Panamera 976 GTS, Turbo E-Hybrid and Turbo S E-Hybrid. Choose Non-OPF or OPF to match the car, then the primary and secondary downpipes.
Specifications
- Primary downpipes: HJS HD 200cpsi 121 mm or 130 mm, GESI GEN2 UHO+ 400cpsi 5" or catless, each with or without a heat shield
- Secondary downpipes: Non-OPF or OPF version, secondary cat bypass
- Installation: 100% bolt-on, OEM-spec CNC machined flanges
- Construction: 100% TIG welded and back purged, 2.0 mm wall
Non OPF version
Required - choose one: Primary Downpipes
971T-DP121Required: choose oneRedstar 4.0L V8 HJS HD 200CPSI 121 mm Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
Redstar's primary downpipes for the Bentley Continental GT V8 / Flying Spur V8 (Mk3), Continental GT / GTC Speed and Flying Spur Speed V8 Hybrid (2025+), Porsche Panamera / GTS / Turbo S E-Hybrid (971) and Panamera GTS / Turbo E-Hybrid / Turbo S E-Hybrid (976) replace the factory top primary downpipes on the 4.0-litre twin-turbo V8. On Bentley models they suit the 4.0 V8 only and do not fit the W12. Redstar designs them for faster turbo spool, sharper throttle response, longer turbo life and an improved exhaust tone, and builds them as a 100% bolt-on fit with OEM-spec CNC machined flanges and all brackets and mounts as on the factory unit.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: HJS HD 200cpsi 121 mm
- Heat shield: Not included
971T-DP121-HSRequired: choose oneRedstar 4.0L V8 Heat Shielded HJS HD 200CPSI 121 mm Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: HJS HD 200cpsi 121 mm
- Heat shield: Included
971T-DP130Required: choose oneRedstar 4.0L V8 HJS HD 200CPSI 130 mm Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: HJS HD 200cpsi 130 mm
- Heat shield: Not included
971T-DP130-HSRequired: choose oneRedstar 4.0L V8 Heat Shielded HJS HD 200CPSI 130 mm Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: HJS HD 200cpsi 130 mm
- Heat shield: Included
971T-DP50Required: choose oneRedstar 4.0L V8 GESI GEN2 UHO+ 400CPSI 5" Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: GESI GEN2 UHO+ 400cpsi 5"
- Heat shield: Not included
971T-DP50-HSRequired: choose oneRedstar 4.0L V8 Heat Shielded GESI GEN2 UHO+ 400CPSI 5" Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: GESI GEN2 UHO+ 400cpsi 5"
- Heat shield: Included
971T-DPCLRequired: choose oneRedstar 4.0L V8 Catless Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: Catless
- Heat shield: Not included
Note For off-road and motorsport use only. This part is not designed to meet emissions or noise standards and is not for use on public roads.
971T-DPCL-HSRequired: choose oneRedstar 4.0L V8 Heat Shielded Catless Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: Catless
- Heat shield: Included
Note For off-road and motorsport use only.
Required: Secondary Downpipes
971T-SCDRequiredRedstar Stainless Steel Secondary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / Turbo S / GTS (971)
Redstar's secondary downpipes bypass the factory secondary catalytic converters on the 4.0-litre twin-turbo V8 Porsche Panamera Turbo / Turbo S / GTS (971/976) and on the Bentley Continental GT / Flying Spur V8. Redstar designs them as a 100% bolt-on part, with OEM-spec CNC machined flanges and all brackets and mounts as on the OEM unit. Redstar states the pipes bring faster turbo spool, sharper throttle response, lower under-bonnet temperatures and an improved exhaust tone.
Key Features
- Secondary catalytic converter bypass
- 100% TIG welded and back purged
- 2.0 mm wall construction
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
- 100% bolt-on installation
Specifications
- Engine: 4.0L twin-turbo V8
- Wall thickness: 2.0 mm
- Construction: 100% TIG welded, back purged
- Flanges: OEM-spec CNC machined
- OPF vehicle: No
Note For off-road and motorsport use only.
OPF version
Required - choose one: Primary Downpipes
971T-DP121Required: choose oneRedstar 4.0L V8 HJS HD 200CPSI 121 mm Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
Redstar's primary downpipes for the Bentley Continental GT V8 / Flying Spur V8 (Mk3), Continental GT / GTC Speed and Flying Spur Speed V8 Hybrid (2025+), Porsche Panamera / GTS / Turbo S E-Hybrid (971) and Panamera GTS / Turbo E-Hybrid / Turbo S E-Hybrid (976) replace the factory top primary downpipes on the 4.0-litre twin-turbo V8. On Bentley models they suit the 4.0 V8 only and do not fit the W12. Redstar designs them for faster turbo spool, sharper throttle response, longer turbo life and an improved exhaust tone, and builds them as a 100% bolt-on fit with OEM-spec CNC machined flanges and all brackets and mounts as on the factory unit.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: HJS HD 200cpsi 121 mm
- Heat shield: Not included
971T-DP121-HSRequired: choose oneRedstar 4.0L V8 Heat Shielded HJS HD 200CPSI 121 mm Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: HJS HD 200cpsi 121 mm
- Heat shield: Included
971T-DP130Required: choose oneRedstar 4.0L V8 HJS HD 200CPSI 130 mm Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: HJS HD 200cpsi 130 mm
- Heat shield: Not included
971T-DP130-HSRequired: choose oneRedstar 4.0L V8 Heat Shielded HJS HD 200CPSI 130 mm Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: HJS HD 200cpsi 130 mm
- Heat shield: Included
971T-DP50Required: choose oneRedstar 4.0L V8 GESI GEN2 UHO+ 400CPSI 5" Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: GESI GEN2 UHO+ 400cpsi 5"
- Heat shield: Not included
971T-DP50-HSRequired: choose oneRedstar 4.0L V8 Heat Shielded GESI GEN2 UHO+ 400CPSI 5" Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: GESI GEN2 UHO+ 400cpsi 5"
- Heat shield: Included
971T-DPCLRequired: choose oneRedstar 4.0L V8 Catless Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: Catless
- Heat shield: Not included
Note For off-road and motorsport use only. This part is not designed to meet emissions or noise standards and is not for use on public roads.
971T-DPCL-HSRequired: choose oneRedstar 4.0L V8 Heat Shielded Catless Primary Downpipes for Bentley Continental GT / Porsche Panamera Turbo / GTS (971)
On Bentley models they suit the 4.0 V8 only and do not fit the W12.
Key Features
- 100% bolt-on installation
- 100% TIG welded and back purged
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
Specifications
- Engine: 4.0L twin-turbo V8
- Position: Primary (top) downpipes
- Construction: 100% TIG welded and back purged
- Wall thickness: 2.0 mm
- Flanges: OEM-spec CNC machined
- Catalytic converter: Catless
- Heat shield: Included
Note For off-road and motorsport use only.
Required: Secondary Downpipes
971T-SCD-OPFRequiredRedstar Stainless Steel OPF Secondary Downpipes for Bentley Continental GT / Flying Spur / Porsche Panamera Turbo / Turbo S / GTS (971/976)
Redstar's secondary downpipes bypass the factory secondary catalytic converters on the 4.0-litre twin-turbo V8 Porsche Panamera Turbo / Turbo S / GTS (971/976) and on the Bentley Continental GT / Flying Spur V8. Redstar designs them as a 100% bolt-on part, with OEM-spec CNC machined flanges and all brackets and mounts as on the OEM unit. Redstar states the pipes bring faster turbo spool, sharper throttle response, lower under-bonnet temperatures and an improved exhaust tone.
Key Features
- Secondary catalytic converter bypass
- 100% TIG welded and back purged
- 2.0 mm wall construction
- OEM-spec CNC machined flanges
- All brackets and mounts as on the OEM unit
- 100% bolt-on installation
Specifications
- Engine: 4.0L twin-turbo V8
- Wall thickness: 2.0 mm
- Construction: 100% TIG welded, back purged
- Flanges: OEM-spec CNC machined
- OPF vehicle: Yes
- ECU tune: Required
Note For off-road and motorsport use only.
Note For off-road and motorsport use only. This part is not designed to meet emissions or noise standards and is not for use on public roads.
Note ECU tune required with the OPF secondary downpipes.
Note Bentley: 4.0 V8 only, not the W12.
Note ECU tune required with the OPF secondary downpipes (971T-SCD-OPF).
