IAG 76mm Throttle Body Adapter

• 2004–2008 Subaru | Forester XT
• 2004–2021 Subaru | WRX STI
• 2006-2007 Subaru | WRX

The IAG 76mm Throttle Body Adapter is an adapter plate kit for 2004-2021 WRX STI, 2006-2007 WRX and 2004-2008 Forester XT models, allowing a larger Big Bore 76mm throttle body to be used. The Big Bore throttle body offers a 76mm bore which is nearly 25% larger over stock and is sold separately.

• Adapter plate: machined from 6061 aluminum with an O-ring sealing surface, available in anodized black or natural silver finish
• Installation: drill out the rivets holding the motor to the OEM throttle body, remove the motor assembly and install it to the Big Bore throttle body using the supplied rivets; the OEM connector is plug and play
• Includes: (x1) IAG aluminum adapter plate, (x4) M6x50mm low profile socket head cap screws, (x4) M6x20mm low profile socket head cap screws, (x4) small O-rings, (x2) large adapter plate O-rings, (x7) rivets
• Part numbers: IAG-AFD-2021SL, IAG-AFD-2021BK, IAG-AFD-2020SL, IAG-AFD-2020BK

Q: Does this adapter fit my Subaru?

A: It fits 2004-2021 WRX STI, 2006-2007 WRX and 2004-2008 Forester XT models, as listed in the fitment information on this page.

Q: What is included?

A: The kit includes one IAG aluminum adapter plate with the screws, O-rings and rivets listed above; the Big Bore 76mm throttle body is not included.

Q: Is tuning required?

A: Yes. ECU calibration is required, and IAG advises consulting with your tuner before ordering.

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