WG38 UltraGate38 GenV 38mm External Wastegate by Turbosmart
Turbosmart UltraGate38 GenV 38mm External Wastegate
If you’re searching for a 38mm wastegate, a compact external wastegate, or the UltraGate38, this is the proven starting point for serious boost control.
The Turbosmart UltraGate38 GenV is a compact 38mm external wastegate designed for smaller turbochargers, responsive street builds and tight engine bay installations where space matters as much as performance.
At Walton Motorsport, the 38mm is commonly specified for small frame turbo setups, fast spool applications and clean, compact manifold designs.
Why Choose a 38mm External Wastegate?
A 38mm wastegate is ideal when:
• Turbocharger size is small
• Engine bay packaging is tight
• Fast boost response is prioritised
• Moderate horsepower targets are planned
• Simplicity and reliability are key
It offers excellent boost control authority for appropriately sized turbo systems without the footprint of larger 40mm, 45mm or 50mm gates.
Correct sizing is about matching exhaust bypass capacity to turbo flow — not simply fitting the biggest gate available.
The GenV Redesign
The GenV UltraGate38 is a ground-up re-engineering of the previous generation.
The only feature retained from Gen4 is the mounting orientation to allow direct replacement upgrades.
Everything else was redesigned using CFD modelling and validated in-house for improved flow and thermal performance.
Key Features
• Class-leading thermal performance
• CFD-optimised and flow bench validated design
• Nitronic 60 valve guide
• High-temperature 347 stainless steel body
• 17-7 PH stainless steel springs
• Modular actuator housing with 360° rotation
• Optional liquid cooling ports
• Collar-locking cap system
The result is improved heat resistance, better fatigue durability and consistent boost control under real-world conditions.
Compact Control That Works
A properly sized 38mm wastegate helps:
• Prevent boost creep on small turbine housings
• Maintain stable base boost pressure
• Improve turbo response
• Deliver predictable boost targets
• Support reliable daily-driven performance
It’s often the perfect solution for responsive road builds and compact turbo systems.
Direct Upgrade for Gen4 UltraGate38
The inlet and outlet mounting orientation remains unchanged from Gen4, allowing:
• Straightforward upgrades
• Compatibility with existing manifolds
• No redesign of flanges required
New internals. Same fitment.
What’s Included in the Box
• GenV UltraGate38 Wastegate
• Full spring kit (3, 5, 7, 14 psi)
• One spring pre-installed
• SS316 valve seat
• Inlet and outlet weld flanges
• Collar locking tool
• 1/8” NPT plugs and fittings
• Mounting hardware
Everything required for installation is included.
Frequently Asked Questions
Do I need to use the liquid cooling ports?
No.
Liquid cooling is optional and typically only required for extreme endurance applications or tightly packaged environments with minimal airflow.
The GenV already incorporates:
• CFD-optimised heat management
• Thermal isolating ceramic spacers
• A highly thermally stable diaphragm
For most street and performance applications, liquid cooling is not necessary.
Can the actuator housing be rotated?
Yes.
The GenV UltraGate38 allows full 360° actuator rotation.
This provides flexibility when routing boost reference lines and helps avoid running hoses near heat sources like turbo manifolds.
It also allows cleaner engine bay presentation.
Will the GenV UltraGate38 fit where my Gen4 did?
Yes.
The inlet and outlet orientation remains identical to Gen4 for direct upgrade compatibility.
How do I change the spring(s)?
The GenV uses a collar-locking cap system.
You must use the supplied collar tool and apply downward pressure to the cap before removing the locking collar.
This improves vibration resistance and long-term durability.
Always follow installation instructions.
What size are the boost reference ports?
All boost reference and optional liquid cooling ports are 1/8” NPT.
Stainless hose tail fittings are included, and -3AN or -4AN motorsport plumbing can also be used.
Is a 38mm Wastegate Big Enough?
For many responsive street builds — yes.
A 38mm external wastegate is typically suited to:
• Small turbochargers
• 250–500hp systems (application dependent)
• Fast spool applications
• Compact engine bay installations
If you’re unsure whether 38mm, 40mm, 45mm or larger is correct for your turbocharger and manifold combination, contact us before ordering.
Boost control is system engineering — not just parts selection.
Why Buy From Walton Motorsport?
We don’t simply resell Turbosmart components.
As a UK-based turbo manifold manufacturer, we understand how:
• Manifold runner placement
• Collector design
• Turbine housing A/R
• Exhaust backpressure
…directly influence correct wastegate sizing.
If you want the right gate for your system — ask before ordering.
More Images
WG38 UltraGate38 GenV 38mm External Wastegate by Turbosmart
Turbosmart UltraGate38 GenV 38mm External Wastegate
If you’re searching for a 38mm wastegate, a compact external wastegate, or the UltraGate38, this is the proven starting point for serious boost control.
The Turbosmart UltraGate38 GenV is a compact 38mm external wastegate designed for smaller turbochargers, responsive street builds and tight engine bay installations where space matters as much as performance.
At Walton Motorsport, the 38mm is commonly specified for small frame turbo setups, fast spool applications and clean, compact manifold designs.
Why Choose a 38mm External Wastegate?
A 38mm wastegate is ideal when:
• Turbocharger size is small
• Engine bay packaging is tight
• Fast boost response is prioritised
• Moderate horsepower targets are planned
• Simplicity and reliability are key
It offers excellent boost control authority for appropriately sized turbo systems without the footprint of larger 40mm, 45mm or 50mm gates.
Correct sizing is about matching exhaust bypass capacity to turbo flow — not simply fitting the biggest gate available.
The GenV Redesign
The GenV UltraGate38 is a ground-up re-engineering of the previous generation.
The only feature retained from Gen4 is the mounting orientation to allow direct replacement upgrades.
Everything else was redesigned using CFD modelling and validated in-house for improved flow and thermal performance.
Key Features
• Class-leading thermal performance
• CFD-optimised and flow bench validated design
• Nitronic 60 valve guide
• High-temperature 347 stainless steel body
• 17-7 PH stainless steel springs
• Modular actuator housing with 360° rotation
• Optional liquid cooling ports
• Collar-locking cap system
The result is improved heat resistance, better fatigue durability and consistent boost control under real-world conditions.
Compact Control That Works
A properly sized 38mm wastegate helps:
• Prevent boost creep on small turbine housings
• Maintain stable base boost pressure
• Improve turbo response
• Deliver predictable boost targets
• Support reliable daily-driven performance
It’s often the perfect solution for responsive road builds and compact turbo systems.
Direct Upgrade for Gen4 UltraGate38
The inlet and outlet mounting orientation remains unchanged from Gen4, allowing:
• Straightforward upgrades
• Compatibility with existing manifolds
• No redesign of flanges required
New internals. Same fitment.
What’s Included in the Box
• GenV UltraGate38 Wastegate
• Full spring kit (3, 5, 7, 14 psi)
• One spring pre-installed
• SS316 valve seat
• Inlet and outlet weld flanges
• Collar locking tool
• 1/8” NPT plugs and fittings
• Mounting hardware
Everything required for installation is included.
Frequently Asked Questions
Do I need to use the liquid cooling ports?
No.
Liquid cooling is optional and typically only required for extreme endurance applications or tightly packaged environments with minimal airflow.
The GenV already incorporates:
• CFD-optimised heat management
• Thermal isolating ceramic spacers
• A highly thermally stable diaphragm
For most street and performance applications, liquid cooling is not necessary.
Can the actuator housing be rotated?
Yes.
The GenV UltraGate38 allows full 360° actuator rotation.
This provides flexibility when routing boost reference lines and helps avoid running hoses near heat sources like turbo manifolds.
It also allows cleaner engine bay presentation.
Will the GenV UltraGate38 fit where my Gen4 did?
Yes.
The inlet and outlet orientation remains identical to Gen4 for direct upgrade compatibility.
How do I change the spring(s)?
The GenV uses a collar-locking cap system.
You must use the supplied collar tool and apply downward pressure to the cap before removing the locking collar.
This improves vibration resistance and long-term durability.
Always follow installation instructions.
What size are the boost reference ports?
All boost reference and optional liquid cooling ports are 1/8” NPT.
Stainless hose tail fittings are included, and -3AN or -4AN motorsport plumbing can also be used.
Is a 38mm Wastegate Big Enough?
For many responsive street builds — yes.
A 38mm external wastegate is typically suited to:
• Small turbochargers
• 250–500hp systems (application dependent)
• Fast spool applications
• Compact engine bay installations
If you’re unsure whether 38mm, 40mm, 45mm or larger is correct for your turbocharger and manifold combination, contact us before ordering.
Boost control is system engineering — not just parts selection.
Why Buy From Walton Motorsport?
We don’t simply resell Turbosmart components.
As a UK-based turbo manifold manufacturer, we understand how:
• Manifold runner placement
• Collector design
• Turbine housing A/R
• Exhaust backpressure
…directly influence correct wastegate sizing.
If you want the right gate for your system — ask before ordering.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Turbosmart UltraGate38 GenV 38mm External Wastegate
If you’re searching for a 38mm wastegate, a compact external wastegate, or the UltraGate38, this is the proven starting point for serious boost control.
The Turbosmart UltraGate38 GenV is a compact 38mm external wastegate designed for smaller turbochargers, responsive street builds and tight engine bay installations where space matters as much as performance.
At Walton Motorsport, the 38mm is commonly specified for small frame turbo setups, fast spool applications and clean, compact manifold designs.
Why Choose a 38mm External Wastegate?
A 38mm wastegate is ideal when:
• Turbocharger size is small
• Engine bay packaging is tight
• Fast boost response is prioritised
• Moderate horsepower targets are planned
• Simplicity and reliability are key
It offers excellent boost control authority for appropriately sized turbo systems without the footprint of larger 40mm, 45mm or 50mm gates.
Correct sizing is about matching exhaust bypass capacity to turbo flow — not simply fitting the biggest gate available.
The GenV Redesign
The GenV UltraGate38 is a ground-up re-engineering of the previous generation.
The only feature retained from Gen4 is the mounting orientation to allow direct replacement upgrades.
Everything else was redesigned using CFD modelling and validated in-house for improved flow and thermal performance.
Key Features
• Class-leading thermal performance
• CFD-optimised and flow bench validated design
• Nitronic 60 valve guide
• High-temperature 347 stainless steel body
• 17-7 PH stainless steel springs
• Modular actuator housing with 360° rotation
• Optional liquid cooling ports
• Collar-locking cap system
The result is improved heat resistance, better fatigue durability and consistent boost control under real-world conditions.
Compact Control That Works
A properly sized 38mm wastegate helps:
• Prevent boost creep on small turbine housings
• Maintain stable base boost pressure
• Improve turbo response
• Deliver predictable boost targets
• Support reliable daily-driven performance
It’s often the perfect solution for responsive road builds and compact turbo systems.
Direct Upgrade for Gen4 UltraGate38
The inlet and outlet mounting orientation remains unchanged from Gen4, allowing:
• Straightforward upgrades
• Compatibility with existing manifolds
• No redesign of flanges required
New internals. Same fitment.
What’s Included in the Box
• GenV UltraGate38 Wastegate
• Full spring kit (3, 5, 7, 14 psi)
• One spring pre-installed
• SS316 valve seat
• Inlet and outlet weld flanges
• Collar locking tool
• 1/8” NPT plugs and fittings
• Mounting hardware
Everything required for installation is included.
Frequently Asked Questions
Do I need to use the liquid cooling ports?
No.
Liquid cooling is optional and typically only required for extreme endurance applications or tightly packaged environments with minimal airflow.
The GenV already incorporates:
• CFD-optimised heat management
• Thermal isolating ceramic spacers
• A highly thermally stable diaphragm
For most street and performance applications, liquid cooling is not necessary.
Can the actuator housing be rotated?
Yes.
The GenV UltraGate38 allows full 360° actuator rotation.
This provides flexibility when routing boost reference lines and helps avoid running hoses near heat sources like turbo manifolds.
It also allows cleaner engine bay presentation.
Will the GenV UltraGate38 fit where my Gen4 did?
Yes.
The inlet and outlet orientation remains identical to Gen4 for direct upgrade compatibility.
How do I change the spring(s)?
The GenV uses a collar-locking cap system.
You must use the supplied collar tool and apply downward pressure to the cap before removing the locking collar.
This improves vibration resistance and long-term durability.
Always follow installation instructions.
What size are the boost reference ports?
All boost reference and optional liquid cooling ports are 1/8” NPT.
Stainless hose tail fittings are included, and -3AN or -4AN motorsport plumbing can also be used.
Is a 38mm Wastegate Big Enough?
For many responsive street builds — yes.
A 38mm external wastegate is typically suited to:
• Small turbochargers
• 250–500hp systems (application dependent)
• Fast spool applications
• Compact engine bay installations
If you’re unsure whether 38mm, 40mm, 45mm or larger is correct for your turbocharger and manifold combination, contact us before ordering.
Boost control is system engineering — not just parts selection.
Why Buy From Walton Motorsport?
We don’t simply resell Turbosmart components.
As a UK-based turbo manifold manufacturer, we understand how:
• Manifold runner placement
• Collector design
• Turbine housing A/R
• Exhaust backpressure
…directly influence correct wastegate sizing.
If you want the right gate for your system — ask before ordering.
