IAG 8mm Thick Phenolic Spacers (pair) WRX 02-14 / STI 04-21 | IAG-AFD-3104

Product Fitment: 

2002-2014 Subaru WRX

2004-2021 Subaru STI

2005-2021 Subaru Legacy GT

2004-2013 Subaru Forester XT

Improve intake efficiency and lower intake air temperatures with the IAG 8mm Phenolic Spacer Kit—engineered for performance, thermal insulation, and precise fitment.

Features:

• 8mm thick CE-grade phenolic spacer provides excellent thermal insulation

• Helps lower and stabilize Intake Air Temperatures (IATs) for improved performance

• Raises intake manifold, providing clearance for custom piping or rotated manifolds

• A cost-effective upgrade for both street and performance applications

• Reduces heat transfer from engine to intake manifold

• Supports increased power potential through cooler, denser intake air
  

• CNC-machined from a solid block of phenolic for precision and durability
  

• Includes custom Nitrile gaskets that resist sticking and residue buildup

• Gaskets engineered to maintain shape and seal after years of heat cycling

• Stainless steel spring pins provide alignment for a perfect fit during install

What’s Included:

• (2) 8mm Phenolic Spacers

• (4) Nitrile Intake Gaskets (2 per side)

• (4) Cylinder Head Spring Pins

• (8) M8x35mm Socket Head Zinc-Plated Screws

Fitment Notes:

• Compatible with IAG V2 & V3 Top Feed TGV housings

• If using IAG V1 or similar TGVs, alternate hardware is required (sold separately: Part# IAG-RPL-AFD-3000-HDW-38)

• Verify fitment before purchase, as manifold height changes may affect clearance