When it comes to intercoolers, GrimmSpeed has really set the bar high, and their latest offering—the 2015-21 STI Front Mount Intercooler Kit—is no exception. If you’re serious about getting the most out of your turbocharged Subaru engine, this kit is a game changer. It's not just about looks; it’s about performance, and trust me, this intercooler delivers.

The core is where the magic happens. Designing an efficient intercooler core is no small feat. Get it right, and you’re looking at a serious boost in performance; get it wrong, and you might as well be using a paperweight. Thankfully, GrimmSpeed has over a decade of experience under their belt, and they've poured that knowledge into a custom design that maximizes cooling efficiency. The core measures in at a solid 27"x11"x4", crafted with a durable bar and plate construction that strikes the perfect balance between pressure drop and heat rejection.

One of the standout features is the beautifully designed cast aluminum end tanks. These aren’t just for show; they’re engineered for optimal flow characteristics, ensuring that whether you’re cruising down the highway or pushing it on the track, you get consistent performance. And let’s be real, it’s nice to know that all this is designed and built right here in the USA by skilled engineers and welders who take pride in their work.

Fitment is another area where GrimmSpeed shines. They’ve learned from the shortcomings of other kits out there. This intercooler retains a massive core without the hassle of cutting up your bumper or relocating components like the washer tank. Just a couple of minor adjustments to the OEM undertray and a few cuts to the splash guard, and you’re good to go. No need to worry about your car looking like a DIY project gone wrong.

Now, let’s talk about the piping. The kit comes with thick .090" wall, 2.5" inside diameter 6061 aluminum piping that’s been bead rolled and CNC mandrel bent. This means maximum flow and a perfect fit every time. Plus, the included 5-ply silicone couplers are tough enough to handle high boost without blowing off. They’re paired with Breeze Hi-Torque liner clamps, which not only look great but also ensure everything stays securely in place.

And if you’re worried about aesthetics, you can choose between a raw aluminum finish or a sleek satin black powdercoat that resists rock chips and corrosion. Either way, your intercooler will look as good as it performs. Plus, you get a high-quality pre-applied GrimmSpeed vinyl decal to show off your pride in having one of the best front mount intercoolers on the market.

Here’s the scoop on some key features:

• Durable construction with minimal pressure drop and excellent heat rejection.
• Robust steel mounting brackets to keep everything secure during hard driving.
• No major modifications needed—just a couple of minor tweaks to fit it in.
• Compatible with factory or GrimmSpeed intakes (just remove the snorkel for max performance).
• Pressure tested to ensure it’s ready to rock right out of the box.
• Available in either raw aluminum or a resilient powdercoat finish.
• No tune required, so you won’t have to worry about changes in boost levels.
• Hand-welded and inspected in the USA for top-notch quality control.

In terms of fitment, this kit is designed specifically for the Subaru STI from 2015 to 2021. If you want to take your ride to the next level, the GrimmSpeed intercooler kit is a solid investment that you won't regret. It's about performance, reliability, and keeping your engine happy, all while looking good under the hood.