PRODUCT INFORMATION

A small part with a big impact, the Perrin Radiator Shroud for the 2015–2021 WRX and STI doesn’t just clean up your engine bay—it improves airflow efficiency where it counts. Whether you’re looking to shave lap times or just keep coolant temps in check during summer pulls, this precision-formed shroud brings both style and function to your build.

Crafted from laser-cut aluminum and finished in a durable powder coat, the Perrin shroud spans the top of the radiator core support, sealing the gap that normally allows air to escape above the radiator. By forcing more airflow directly through the radiator fins instead of over and around them, cooling system efficiency is increased—resulting in better performance under hard driving conditions or in stop-and-go traffic. It’s a subtle but measurable enhancement to cooling system dynamics, especially when paired with upgraded radiators or fans.

But function aside, let’s be honest—this piece transforms the engine bay. Perrin’s clean laser-etched logo, smooth edges, and rich finish give your WRX or STI that purpose-built look, especially when combined with other engine dress-up components. It also helps hide unsightly core support hardware and wiring, making the entire bay feel more cohesive and premium.

Installation is quick and painless with basic hand tools—no trimming or modification needed. It’s compatible with OEM and most aftermarket radiators and intercoolers. Whether you’re chasing form, function, or both, the Perrin radiator shroud delivers.

Laser-cut aluminum construction with powder-coated finish for durability and visual appeal
Improves radiator efficiency by directing airflow through the core, not over it
Enhances engine bay aesthetics and cleans up exposed areas near the core support
Simple bolt-on installation with included hardware

Perrin’s dedication to both form and function is evident in every component they offer, and this shroud is no exception. It’s a small mod, but like most of Perrin’s catalog, it plays a smart role in building a better-performing, more refined WRX or STI.

Perrin Performance products are covered under a separate manufacturer's warranty.

Should you be concerned about the fitment or performance of a product, or otherwise believe it may have a manufacturing defect, please reach out to our support team.

We can provide installation support, troubleshooting advice, and assistance in identifying any potential manufacturing defects. If we suspect that your product does have a defect, our team will serve as a point of contact with the manufacture to help arrange a warranty inspection and to help facilitate the manufacture's warranty process.