7305

Suits WRX STI 1999-2021

The WGA is a high-performance bolt-on internal wastegate actuator designed to bring boost on sooner and hold it longer!

The WGA is all about increasing the “area under the boost curve”. With a larger diaphragm than the OEM actuator, the WGA has more “control authority” over the wastegate flap. This makes it harder for exhaust backpressure to blow the wastegate open during spool up and at high RPM, two areas of the boost curve where the factory actuator can be overwhelmed.

This benefit is particularly useful with Subaru’s factory “2-port” boost control system, which cannot effectively shut off pressure to the wastegate during spool up.

Supplied with 3 springs and a unique turnbuckle pre-load adjustment, the base boost pressure can be configured and adjusted from 5psi to 24psi for the best possible boost control.

Read on for more technical information on wastegate springs, and how the correct spring selection can improve performance.

The WGA features a longer stroke, shorter height, and more adjustment than its rivals.

WGA part # 7305 is designed to bolt on to Subaru WRX STI models from MY99-21 and will also fit most single-scroll IHI VF turbos. The 5psi and 10psi springs are installed for a base pressure of 15psi, and the 7psi spring is included in the packaging for further tuning options.

Please note that whilst this is a physical “bolt-on” product, it should be considered a tuning tool as it WILL increase boost pressure and therefore TUNING IS REQUIRED.

GFB Warranty

Built-in Obsolescence? Not with GFB!

We live in a throw-away society, conditioned by cheap products and frequently released new models, to expect eventual failure and discard something when it stops working or is superseded. However, pride in workmanship and our commitment to quality means that when we put our name to something, we are also staking our reputation on it.

That’s why we back our products with the best Warranty in the business! You should expect a lifetime of use from a well-engineered product, so if your GFB product fails as a result of defective materials or faulty workmanship whilst you remain the original owner, we will repair or replace it. For full warranty details, please visit the GFB Australia website.

If the fault of occurred as a result of usage outside of the terms of the warranty, or you are not the original owner, fear not, we can still help you. You should never need to throw a GFB product away, as spare parts are available and won’t cost the earth.

Tech Support: We don't have a "Tech Support" team or department. We have engineers. When you contact us through our tech support email, you will be dealing directly with the engineers who actually design GFB products. They have more experience with the product than anyone on the planet to ensure you get the right advice.