IAG “Trim to Fit” Top Mount Intercooler Coupler Kit for 2004-21 Subaru STI

The IAG “Trim To Fit” Top Mount Intercooler Coupler Kit is designed for 2004–2021 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.

Both the turbo coupler and throttle body coupler are built from heavy-duty 5-ply aramid reinforced silicone that holds its shape under boost and stands up to the heat of a turbocharged engine bay. Designed to resist softening and deformation, the reinforced silicone construction helps maintain a secure connection, even when boost pressure builds.

Top mount intercooler couplers on Subarus are designed to fit tight, which can make installing the coupler on the turbocharger a little tricky. To make the job easier, the IAG turbo coupler features an integrated pry point that gives you a solid place to use a screwdriver or pry bar without risking damage to the silicone during installation.

A quality coupler deserves a quality clamp. That’s why the IAG “Stock” Top Mount Intercooler Coupler Kit comes with four heavy-duty lined stainless steel clamps instead of standard worm-drive clamps. These premium clamps feature bead-rolled inner edges for added strength and resistance to deformation, along with a smooth inner liner that helps prevent the clamp from cutting into or damaging the silicone couplers.

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 2004–2021 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 2002-2007 Subaru Impreza WRX and 2004-2008 Forester XT if they have an aftermarket STI top mount intercooler.