Go Fast Bits 99-21 Subaru WRX STI WGA Wastegate Actuator (Tune Required) (gfb7305)

OFF-ROAD OR MOTORSPORTS USE ONLY. This part is not CARB legal. It is not legal for sale or use on pollution-controlled motor vehicles in California or in other states that follow California emissions rules. It is sold for off-road or motorsports use only.

This is the Go Fast Bits 99-21 Subaru WRX STI WGA Wastegate Actuator (Tune Required). Part gfb7305. Blow-off and bypass valves vent boost pressure between shifts; wastegates control maximum boost.

Massive Performance, Compact Size.

Industry-first diaphragm design - the WGA's Silicone/Nomex diaphragm uses a new bead retention design that achieves the largest effective area with the smallest possible outside diameter. This keeps the overall size of the WGA down whilst giving it more control authority over the wastegate flap, resulting in better boost control. It's like telling your turbo what to do instead of pleading with it!

Longest stroke – with 18mm of rod travel, the WGA is suitable for controlling the largest of internal wastegates, or the extra travel can be used to further increase boost pressure without having to change springs.

Unique pivoting rod guide – machined from PEEK (an extremely high-performance engineering polymer), the encapsulated spherical rod guide takes up significantly less height in the actuator body than other designs, whilst offering low friction and superior wear resistance.

No unnecessary bulk – sounds obvious, but attention to detail in the design means the WGA is the shortest actuator on the market.

More Adjustable, More Easily.

Setting the base spring pressure correctly for your application can have significant performance benefits, so we made sure the WGA offers the best adjustability on the market!

We supply 3 stainless steel springs that can be used in any combination ranging from 5psi to 22psi, but that's only the beginning. Whilst other brands may offer more spring options (sold separately), changing springs to fine-tune boost pressure is time consuming and quite frankly, a pain.

That's why we added another industry first - turnbuckle adjustment. The long stroke of the WGA means more adjustment range for the spring pre-load, so you can fine-tune your base boost pressure in a matter of minutes without swapping springs or removing the actuator.

Features and benefits

• WGA Benefits (compared to a factory-fitted actuator):
• Faster spool up
• Less boost taper at high RPM
• More stable boost control
• Customizable spring rates
• Supports higher boost pressure

Product details

• Part type: Blow-Off Valves & Wastegates
• Brand: Go Fast Bits
• Body Color: Black
• Body Material: Stainless Steel
• Grade Type: Performance
• Go Fast Bits part number: gfb7305

Fitment

• Vehicle: Subaru Impreza WRX STI (GD), Subaru WRX/STI (GR/GV), Subaru WRX/STI (VA)
• Years and trims on file: 2004-2014 Subaru Impreza WRX STI; 2015-2021 Subaru WRX STI Base; 2015 Subaru WRX STI Launch Edition; 2015-2021 Subaru WRX STI Limited; 2019 Subaru WRX STI S209; 2016 Subaru WRX STI Series.HyperBlue; 2018 Subaru WRX STI Type RA
• Application listing: Go Fast Bits 99-21 Subaru WRX STI WGA Wastegate Actuator (Tune Required)
• Check the vehicle, model years, engine and trim above against your car before ordering. Not sure? Ask us and we will check it against your VIN.

Emissions: off-road or motorsports use only

This part is not CARB legal and is sold for off-road or motorsports use only. It is not intended for use on vehicles driven on public roads. By ordering, the buyer accepts responsibility for checking and following federal, state and local emissions laws where the vehicle is used. Questions? Ask us before you order.

Shipping & returns

• Orders are processed within 1–3 business days; standard delivery is 3–7 business days within the United States.
• Go Fast Bits parts are supplied through our distributor. We confirm availability and lead time with you after you order.
• We currently ship within the U.S. only. See our Shipping Policy.
• 30-day returns on unused parts in original packaging — see our Return Policy.

Installation at Team ANBD

Team ANBD is a performance shop in Andover, New Jersey. We can align or corner-balance the car, and prep track cars. Book an appointment or ask us about installation and fitment before you order.

California Proposition 65

WARNING: This product can expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information go to www.P65Warnings.ca.gov.