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 |  SKU: IAG-ENG-2352BK

IAG “Trim to Fit” Top Mount Intercooler Coupler Kit

Subaru STI 01-21
$249.95
Colour: Black
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Description

The IAG “Trim To Fit” Top Mount Intercooler Coupler Kit is designed for 2001–2021 Subaru STI owners running aftermarket intercoolers or turbo setups that need more flexibility with fitment. The kit includes a standard-length throttle body coupler and a 90-degree turbo coupler that is 8mm longer on each end to accommodate a wider range of intercooler and turbocharger combinations. The longer turbo coupler can be trimmed as needed to dial in the fit and maintain a strong, reliable seal.

Constructed from aramid-reinforced silicone, the IAG couplers are engineered to hold their shape under load and resist cracking, swelling, or softening over time. Compared to the factory 3‑ply couplers, the 5‑ply design provides additional wall strength and improved clamping security, particularly important on vehicles running higher boost levels or exposed to prolonged under‑bonnet temperatures.

The turbo outlet coupler is specifically shaped for tight-fitting top mount intercooler installations on Subaru platforms. A moulded clamp holder helps keep the clamp correctly positioned as you install the coupler, reducing the chance of misalignment or slippage. An integrated pry point offers a purpose-designed spot to use a screwdriver or small pry bar, which can be especially helpful when working in confined engine bays, and helps protect the silicone from accidental damage during installation or removal.

To complement the upgraded couplers, IAG includes four heavy-duty lined stainless steel clamps in the kit. These clamps feature bead-rolled inner edges to improve strength and resist deformation as they are tightened, along with a smooth inner liner that helps prevent cutting or scoring of the silicone. This combination of robust couplers and premium clamps provides a secure, durable connection at both the turbo and throttle body.

The IAG “Trim To Fit” Top Mount Intercooler Coupler Kit comes complete with the lengthened Turbo Coupler, Throttle Body Coupler, and heavy-duty lined stainless steel clamps for a durable, reliable connection and straightforward installation. Available in black, red, or blue, this convenient kit delivers the durability and performance your STI needs while adding a more aggressive look under the hood.

IAG’s “Trim To Fit” Top Mount Intercooler Coupler Kit is for a 2001–2021 Subaru STI with an aftermarket top mount intercooler or turbo that requires a 90-degree silicone coupler with added length that can be trimmed to fit the custom application. The coupler kit also fits the 2001-2007 Subaru Impreza WRX and 2003-2008 Forester XT if they have an aftermarket STI top mount intercooler.

Features and Benefits

  • Upgraded replacement for factory couplers
    Provides a stronger, longer-lasting solution than ageing OEM rubber couplers on 2001–2021 STI models and compatible WRX/Forester XT setups.
  • 90-degree silicone coupler has added length that can be trimmed to fit the custom application.
  • 5‑ply aramid reinforced silicone
    Heavy-duty 5‑ply construction resists expansion under boost, heat soak, and long-term exposure to under‑bonnet temperatures.
  • Improved boost retention
    Stiffer walls and secure clamping help maintain a reliable seal, reducing the chance of boost leaks that can affect performance and drivability.
  • Designed for tight TMIC fitment
    Moulded clamp holder and integrated pry point on the turbo coupler simplify installation in confined engine bays and help protect the silicone from damage.
  • Heavy-duty lined stainless clamps
    Included clamps feature bead-rolled edges and a smooth inner liner that reduce clamp distortion and minimise the risk of cutting the couplers.
  • Complete kit for turbo and throttle body
    Includes both the turbo to top mount intercooler and throttle body couplers, plus matching clamps, for a consistent, hassle-free installation.
  • OEM-style fitment with performance focus
    Maintains factory-style routing while providing a more robust solution for standard or mildly increased boost levels.
  • Colour options to suit your build
    Offered in black, red, or blue to complement other under‑bonnet components and add a subtle visual upgrade.

Technical Specifications

  • Product type: Top mount intercooler coupler kit
  • Construction: 5‑ply aramid reinforced silicone couplers
  • Clamps: Heavy-duty lined stainless steel, bead-rolled inner edges
  • Fitment – primary: Subaru STI 2001–2021 (with top mount intercooler)
  • Additional fitment: Subaru Impreza WRX 2001–2007 with STI top mount intercooler; Subaru Forester XT 2003–2008 with STI top mount intercooler
  • Configuration: Turbo to intercooler coupler and throttle body coupler
  • Colour options: Black, red, blue
  • SKU: IAG-ENG-2350BK
  • Brand: IAG Performance

Included Components

  • 1 x IAG “Stock” Turbo to Top Mount Intercooler Silicone Coupler
  • 1 x IAG Throttle Body Silicone Coupler
  • 2 x Turbo coupler heavy-duty lined stainless steel clamps
  • 2 x Throttle body coupler heavy-duty lined stainless steel clamps

Media

Fitment Table