GFB WGA Wastegate Actuator (Tune Required) For 2014-21 Subaru WRX STI - 7305

7305 WGA STI WASTEGATE ACTUATOR

SPECIFIC PRODUCT INFORMATION

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.

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

WGA part # 7305 is designed for 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 “bolt-on” product, it should be considered a tuning tool as it WILL increase boost pressure and therefore TUNING IS REQUIRED.

MORE ABOUT THIS RANGE

When it comes to external wastegates, some things you want big, others you want small – like big flow, small size, right?
GFB offers a range that are among the most compact external wastegates in their class, being shorter in height than their closest rivals without sacrificing flow.

All GFB wastegates feature an investment cast body made from 253MA chromium-nickel stainless steel, a CNC machined billet stainless valve, and all stainless steel weld-on fittings and hardware, whilst the diaphragm is nomex-reinforced silicone. All this adds up to a wastegate built to handle extreme conditions with reliability you can trust!

• Most compact wastegate range on the market!
• Body, valve, seat and all mounting hardware is CNC machined from high-temp stainless steel
• Actuator housing CNC machined from billet 6061 aluminum
• Nomex-reinforced silicone diaphragm
• Internal shroud protects valve stem from excessive heat and prevents carbon-related sticking
• V-band clamp mounting system
• Made in Australia under ISO 9001