IAG Black Lower Intake Plenum for 2015–2021 Subaru WRX | IAG-AFD-3020BK

The IAG lower intake plenum replaces the factory tumble generator valve (TGV) housings and separate lower plastic risers on the 2015–2021 Subaru WRX FA20DIT engine. CNC-machined billet aluminium construction and a black anodized finish provide an alternative to the original two-section arrangement. Ships fast across Canada and the US.

Features

• Replaces the factory TGV housings and lower plastic risers.
• CNC-machined billet aluminium construction.
• Black anodized finish.
• Removes the diverter found in the original lower riser.
• Port-matched design for the original cylinder-head ports.
• No additional porting modifications to the housings required.

Vehicle Fitment

• Subaru WRX: 2015–2021, FA20DIT engine.

Fitment is not extended to EJ-powered WRX STI models or the later FA24 WRX. Modified or engine-swapped vehicles require verification against the installed engine and intake components.

Specifications

• Brand: IAG Performance.
• Manufacturer part number: IAG-AFD-3020BK.
• Product type: lower intake plenum / complete TGV housing replacement.
• Material: billet aluminium.
• Finish: black anodized.

Included Components

• Two CNC-machined lower intake risers.
• 14 socket-head bolts.
• 14 flat washers.

Installation Planning

Follow the instructions for the exact IAG assembly. Inspect the intake seals and confirm whether replacements are needed before installation; a seal set is not listed among the supplied components above. Verify compatibility with the installed upper manifold, fuel plumbing and related components.

Professional installation is recommended. Confirm calibration requirements before operation and check all intake connections for leaks after assembly. Removing restrictions does not establish a guaranteed horsepower gain, and results depend on the complete engine combination.

Ships fast across Canada and the US.