WG40 CompGate40 GenV 40mm External Wastegate by Turbosmart
Turbosmart CompGate40 GenV 40mm External Wastegate
If you're searching for a 40mm wastegate, a CompGate40, or a compact external wastegate for a responsive turbo build — this is where smart boost control starts.
The Turbosmart CompGate40 GenV is a compact 40mm external wastegate designed for smaller turbochargers and tighter engine bays, delivering reliable boost control without unnecessary bulk.
At Walton Motorsport, the 40mm is often specified for fast spool street builds, smaller frame turbochargers and applications where packaging space is limited but control still matters.
Why Choose a 40mm External Wastegate?
A 40mm wastegate is ideal when:
• Turbocharger size is small to medium
• Engine bay space is tight
• Quick response is prioritised
• Moderate power targets are planned
• A compact manifold design is used
It offers excellent control authority for appropriately sized turbo systems without the footprint of larger 45mm, 50mm or 60mm units.
Correct sizing is about matching bypass flow to turbo flow — not simply choosing the biggest option available.
The GenV Advantage
The GenV CompGate40 is a complete redesign over the previous generation.
The only feature retained from Gen4 is the mounting orientation, allowing direct upgrade compatibility.
Everything else was engineered using CFD modelling and in-house flow bench validation.
Key Features
• Class-leading thermal performance
• CFD-optimised and bench validated flow path
• 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
• Strap-type V-band clamps
• Collar-locking cap system
The result is improved durability, reduced heat transfer and more consistent boost control under real-world load.
Compact Doesn’t Mean Compromised
A properly sized 40mm wastegate helps:
• Prevent boost creep on small turbine housings
• Maintain stable base boost levels
• Improve turbo response
• Deliver predictable torque management
• Support reliable daily-driven performance builds
Especially in tight installations where larger gates would complicate packaging.
Direct Upgrade for Gen4 CompGate40
The inlet and outlet mounting orientation remains unchanged from Gen4, allowing:
• Simple replacement upgrades
• Compatibility with existing manifolds
• No flange redesign required
Modern internals. Proven fitment.
What’s Included in the Box
• GenV CompGate40 Wastegate
• Full spring kit (3, 5, 7, 14 psi)
• One spring pre-installed
• SS316 valve seat
• V-band clamps
• 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 generally only required for extreme endurance or restricted airflow environments.
The GenV already incorporates:
• CFD-optimised thermal management
• Thermal isolating ceramic spacers
• A highly thermally stable diaphragm
For most street and performance builds, liquid cooling is unnecessary.
Can the actuator housing be rotated?
Yes.
The GenV CompGate40 allows full 360° actuator rotation.
This provides flexibility when routing boost reference hoses and helps avoid running lines near turbo manifolds or other heat sources.
It also improves installation neatness in tight engine bays.
Will the GenV CompGate40 fit where my Gen4 did?
Yes.
The inlet and outlet mounting 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 design improves vibration resistance and long-term reliability.
Always follow installation instructions carefully.
What size are the boost reference ports?
All boost reference and optional liquid cooling ports are 1/8” NPT.
Stainless hose tail barbs are included, and -3AN or -4AN motorsport fittings can also be used.
Is a 40mm Wastegate Big Enough?
For many responsive street builds — yes.
A 40mm external wastegate is typically ideal for:
• Small to medium turbochargers
• 300–600hp applications (system dependent)
• Fast spool setups
• Tight packaging installations
If you’re unsure whether a 40mm, 45mm, 50mm or 60mm gate is correct for your build, contact us before ordering.
Wastegate sizing is part of boost system design — not just a parts decision.
Why Buy From Walton Motorsport?
We don’t just sell Turbosmart products.
As a UK-based turbo manifold manufacturer, we design and build systems where wastegate selection directly affects boost stability and reliability.
We understand how:
• Manifold design
• Turbo sizing
• Turbine A/R
• Exhaust backpressure
…all influence correct wastegate choice.
If you want it right the first time — ask.
Original: $596.15
-65%$596.15
$208.65More Images
WG40 CompGate40 GenV 40mm External Wastegate by Turbosmart
Turbosmart CompGate40 GenV 40mm External Wastegate
If you're searching for a 40mm wastegate, a CompGate40, or a compact external wastegate for a responsive turbo build — this is where smart boost control starts.
The Turbosmart CompGate40 GenV is a compact 40mm external wastegate designed for smaller turbochargers and tighter engine bays, delivering reliable boost control without unnecessary bulk.
At Walton Motorsport, the 40mm is often specified for fast spool street builds, smaller frame turbochargers and applications where packaging space is limited but control still matters.
Why Choose a 40mm External Wastegate?
A 40mm wastegate is ideal when:
• Turbocharger size is small to medium
• Engine bay space is tight
• Quick response is prioritised
• Moderate power targets are planned
• A compact manifold design is used
It offers excellent control authority for appropriately sized turbo systems without the footprint of larger 45mm, 50mm or 60mm units.
Correct sizing is about matching bypass flow to turbo flow — not simply choosing the biggest option available.
The GenV Advantage
The GenV CompGate40 is a complete redesign over the previous generation.
The only feature retained from Gen4 is the mounting orientation, allowing direct upgrade compatibility.
Everything else was engineered using CFD modelling and in-house flow bench validation.
Key Features
• Class-leading thermal performance
• CFD-optimised and bench validated flow path
• 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
• Strap-type V-band clamps
• Collar-locking cap system
The result is improved durability, reduced heat transfer and more consistent boost control under real-world load.
Compact Doesn’t Mean Compromised
A properly sized 40mm wastegate helps:
• Prevent boost creep on small turbine housings
• Maintain stable base boost levels
• Improve turbo response
• Deliver predictable torque management
• Support reliable daily-driven performance builds
Especially in tight installations where larger gates would complicate packaging.
Direct Upgrade for Gen4 CompGate40
The inlet and outlet mounting orientation remains unchanged from Gen4, allowing:
• Simple replacement upgrades
• Compatibility with existing manifolds
• No flange redesign required
Modern internals. Proven fitment.
What’s Included in the Box
• GenV CompGate40 Wastegate
• Full spring kit (3, 5, 7, 14 psi)
• One spring pre-installed
• SS316 valve seat
• V-band clamps
• 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 generally only required for extreme endurance or restricted airflow environments.
The GenV already incorporates:
• CFD-optimised thermal management
• Thermal isolating ceramic spacers
• A highly thermally stable diaphragm
For most street and performance builds, liquid cooling is unnecessary.
Can the actuator housing be rotated?
Yes.
The GenV CompGate40 allows full 360° actuator rotation.
This provides flexibility when routing boost reference hoses and helps avoid running lines near turbo manifolds or other heat sources.
It also improves installation neatness in tight engine bays.
Will the GenV CompGate40 fit where my Gen4 did?
Yes.
The inlet and outlet mounting 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 design improves vibration resistance and long-term reliability.
Always follow installation instructions carefully.
What size are the boost reference ports?
All boost reference and optional liquid cooling ports are 1/8” NPT.
Stainless hose tail barbs are included, and -3AN or -4AN motorsport fittings can also be used.
Is a 40mm Wastegate Big Enough?
For many responsive street builds — yes.
A 40mm external wastegate is typically ideal for:
• Small to medium turbochargers
• 300–600hp applications (system dependent)
• Fast spool setups
• Tight packaging installations
If you’re unsure whether a 40mm, 45mm, 50mm or 60mm gate is correct for your build, contact us before ordering.
Wastegate sizing is part of boost system design — not just a parts decision.
Why Buy From Walton Motorsport?
We don’t just sell Turbosmart products.
As a UK-based turbo manifold manufacturer, we design and build systems where wastegate selection directly affects boost stability and reliability.
We understand how:
• Manifold design
• Turbo sizing
• Turbine A/R
• Exhaust backpressure
…all influence correct wastegate choice.
If you want it right the first time — ask.
Product Information
Product Information
Shipping & Returns
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Description
Turbosmart CompGate40 GenV 40mm External Wastegate
If you're searching for a 40mm wastegate, a CompGate40, or a compact external wastegate for a responsive turbo build — this is where smart boost control starts.
The Turbosmart CompGate40 GenV is a compact 40mm external wastegate designed for smaller turbochargers and tighter engine bays, delivering reliable boost control without unnecessary bulk.
At Walton Motorsport, the 40mm is often specified for fast spool street builds, smaller frame turbochargers and applications where packaging space is limited but control still matters.
Why Choose a 40mm External Wastegate?
A 40mm wastegate is ideal when:
• Turbocharger size is small to medium
• Engine bay space is tight
• Quick response is prioritised
• Moderate power targets are planned
• A compact manifold design is used
It offers excellent control authority for appropriately sized turbo systems without the footprint of larger 45mm, 50mm or 60mm units.
Correct sizing is about matching bypass flow to turbo flow — not simply choosing the biggest option available.
The GenV Advantage
The GenV CompGate40 is a complete redesign over the previous generation.
The only feature retained from Gen4 is the mounting orientation, allowing direct upgrade compatibility.
Everything else was engineered using CFD modelling and in-house flow bench validation.
Key Features
• Class-leading thermal performance
• CFD-optimised and bench validated flow path
• 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
• Strap-type V-band clamps
• Collar-locking cap system
The result is improved durability, reduced heat transfer and more consistent boost control under real-world load.
Compact Doesn’t Mean Compromised
A properly sized 40mm wastegate helps:
• Prevent boost creep on small turbine housings
• Maintain stable base boost levels
• Improve turbo response
• Deliver predictable torque management
• Support reliable daily-driven performance builds
Especially in tight installations where larger gates would complicate packaging.
Direct Upgrade for Gen4 CompGate40
The inlet and outlet mounting orientation remains unchanged from Gen4, allowing:
• Simple replacement upgrades
• Compatibility with existing manifolds
• No flange redesign required
Modern internals. Proven fitment.
What’s Included in the Box
• GenV CompGate40 Wastegate
• Full spring kit (3, 5, 7, 14 psi)
• One spring pre-installed
• SS316 valve seat
• V-band clamps
• 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 generally only required for extreme endurance or restricted airflow environments.
The GenV already incorporates:
• CFD-optimised thermal management
• Thermal isolating ceramic spacers
• A highly thermally stable diaphragm
For most street and performance builds, liquid cooling is unnecessary.
Can the actuator housing be rotated?
Yes.
The GenV CompGate40 allows full 360° actuator rotation.
This provides flexibility when routing boost reference hoses and helps avoid running lines near turbo manifolds or other heat sources.
It also improves installation neatness in tight engine bays.
Will the GenV CompGate40 fit where my Gen4 did?
Yes.
The inlet and outlet mounting 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 design improves vibration resistance and long-term reliability.
Always follow installation instructions carefully.
What size are the boost reference ports?
All boost reference and optional liquid cooling ports are 1/8” NPT.
Stainless hose tail barbs are included, and -3AN or -4AN motorsport fittings can also be used.
Is a 40mm Wastegate Big Enough?
For many responsive street builds — yes.
A 40mm external wastegate is typically ideal for:
• Small to medium turbochargers
• 300–600hp applications (system dependent)
• Fast spool setups
• Tight packaging installations
If you’re unsure whether a 40mm, 45mm, 50mm or 60mm gate is correct for your build, contact us before ordering.
Wastegate sizing is part of boost system design — not just a parts decision.
Why Buy From Walton Motorsport?
We don’t just sell Turbosmart products.
As a UK-based turbo manifold manufacturer, we design and build systems where wastegate selection directly affects boost stability and reliability.
We understand how:
• Manifold design
• Turbo sizing
• Turbine A/R
• Exhaust backpressure
…all influence correct wastegate choice.
If you want it right the first time — ask.
