Wastegate Actuators

Select your vehicle to see Wastegate Actuators that fit

Wastegate Actuators: Boost Control That Actually Holds Your Target

A wastegate actuator is the pressure-driven arm that opens the wastegate valve to bleed exhaust past the turbine, capping boost so your turbo doesn't overrun its target. On an internal wastegate setup, the actuator bolts to the turbo and pushes a rod to crack the flapper. Swap the weak factory unit for a stiffer wastegate actuator and you get a firmer spring pressure, cleaner boost response, and less creep at the top of the rev range. Fit one when you've outgrown the stock boost curve or you're chasing a specific base pressure your tune expects.

What ThreePiece stocks

This category runs 56 wastegate actuators from 6 brands, priced from $174 to $586 in current in-stock inventory (not a locked price). Turbosmart makes up the bulk of the range at 45 units, with Go Fast Bits (4), aFe (3), TiALSport (2), HKS (1) and Garrett (1) filling out the rest. Fitment data covers 35 of these products across model years 1993 to 2025, with strong representation for Mitsubishi, Subaru, Ford, Dodge, Nissan and Porsche platforms including the Lancer Evolution VI through X, Impreza WRX and STI, Mustang, Fiesta ST, Focus RS and Nissan Silvia.

How to choose

Start with your turbo and the base pressure your build needs. A twin-port actuator like the Turbosmart Gen V IWG Twin Port for the Garrett G25 (14psi) gives you tighter control on a modern frame turbo. For a factory-turbo platform, a direct-fit unit like the GFB Mitsubishi TD04 internal actuator keeps the swap simple. Note that some units, such as the GFB Ralliart 4B11T actuator, are marked tune-required, meaning the ECU has to be recalibrated for the new spring. Diesel truck owners have options too, like the adjustable aFe BladeRunner Street Series (20-60 PSI) for 98.5-02 Dodge diesels and the matching 99.5-03 Ford 7.3L version. The top of the range, the Turbosmart IWG75 for the 95-98 Porsche 993 Turbo (24 PSI), shows the high-pressure end of what's here. Higher spring pressure means more boost at the floor but demands supporting fuel and tuning.

What else you need

Plan the plumbing around the actuator. Check Fittings and Adapters for your boost reference and vacuum lines, and if you're pushing more boost, make sure the Fuel Pumps can keep up. A build that's coming apart for a turbo change is also the time to look at Head Gaskets. Browse the full Engine Components section for everything else on the list.

Fitment and ordering

Not sure a unit clears your turbo or matches your target pressure? Call fitment help at 813-535-5801 before you buy. All orders ship free, and Affirm financing is available at checkout through our financing options.

Wastegate Actuators: Boost Control That Actually Holds Your Target

A wastegate actuator is the pressure-driven arm that opens the wastegate valve to bleed exhaust past the turbine, capping boost so your turbo doesn't overrun its target. On an internal wastegate setup, the actuator bolts to the turbo and pushes a rod to crack the flapper. Swap the weak factory unit for a stiffer wastegate actuator and you get a firmer spring pressure, cleaner boost response, and less creep at the top of the rev range. Fit one when you've outgrown the stock boost curve or you're chasing a specific base pressure your tune expects.

What ThreePiece stocks

This category runs 56 wastegate actuators from 6 brands, priced from $174 to $586 in current in-stock inventory (not a locked price). Turbosmart makes up the bulk of the range at 45 units, with Go Fast Bits (4), aFe (3), TiALSport (2), HKS (1) and Garrett (1) filling out the rest. Fitment data covers 35 of these products across model years 1993 to 2025, with strong representation for Mitsubishi, Subaru, Ford, Dodge, Nissan and Porsche platforms including the Lancer Evolution VI through X, Impreza WRX and STI, Mustang, Fiesta ST, Focus RS and Nissan Silvia.

How to choose

Start with your turbo and the base pressure your build needs. A twin-port actuator like the Turbosmart Gen V IWG Twin Port for the Garrett G25 (14psi) gives you tighter control on a modern frame turbo. For a factory-turbo platform, a direct-fit unit like the GFB Mitsubishi TD04 internal actuator keeps the swap simple. Note that some units, such as the GFB Ralliart 4B11T actuator, are marked tune-required, meaning the ECU has to be recalibrated for the new spring. Diesel truck owners have options too, like the adjustable aFe BladeRunner Street Series (20-60 PSI) for 98.5-02 Dodge diesels and the matching 99.5-03 Ford 7.3L version. The top of the range, the Turbosmart IWG75 for the 95-98 Porsche 993 Turbo (24 PSI), shows the high-pressure end of what's here. Higher spring pressure means more boost at the floor but demands supporting fuel and tuning.

What else you need

Plan the plumbing around the actuator. Check Fittings and Adapters for your boost reference and vacuum lines, and if you're pushing more boost, make sure the Fuel Pumps can keep up. A build that's coming apart for a turbo change is also the time to look at Head Gaskets. Browse the full Engine Components section for everything else on the list.

Fitment and ordering

Not sure a unit clears your turbo or matches your target pressure? Call fitment help at 813-535-5801 before you buy. All orders ship free, and Affirm financing is available at checkout through our financing options.