If you’re anything like me, you know that the stock splitter on your WRX can be a real pain when it comes to getting the most out of your top mount intercooler (TMIC). Every time I popped the hood, that OEM splitter was a constant reminder of how it was choking off the airflow my upgraded TMIC desperately needed. It’s frustrating, especially if you’ve already made the jump to an STI scoop and want to actually utilize that extra airflow. After dealing with this for a while, I stumbled upon the GrimmSpeed TMIC Splitter lineup, and let me tell you, it’s a game changer.

Our cars generate a lot of heat, especially when you start tweaking things. The turbo compresses the intake air, and it’s not unheard of to see temps soaring over 400°F before they even hit the intercooler. If you’ve upgraded to a larger TMIC, you’re probably aware that it can increase internal core volume by up to 200%. But here’s the kicker: if you’re still running with the stock splitter, you’re not getting the airflow you need to keep everything cool. That’s where the GrimmSpeed splitters come in—they boost the opening size by a whopping 70%. More airflow means better cooling, and that’s crucial for performance.

• 70% Increase in Flow Capacity: This isn’t just a minor tweak; it massively enhances your TMIC’s ability to dissipate heat.
• Maximized TMIC Efficiency: Lower outlet temperatures mean you can push your car harder without worrying about heat soak.
• Even Flow Distribution: The design ensures that the entire core of the intercooler gets the airflow it needs to cool that hot charge air effectively.
• Precision Engineering: With CAD design and simulation, you can trust that this splitter fits and functions perfectly.
• Built to Last: Made from CNC laser-cut 5052 aluminum, it’s tough enough to handle the heat and vibrations.
• OEM Finish: The durable DuPont black powder coat not only looks great but protects the splitter too.
• Custom Gasket: The EPDM rubber gasket ensures a solid seal and longevity, so you won’t have to worry about replacements anytime soon.
• Intercooler Sprayer Ports: It comes with three ports for sprayers, so you can hook up your STI TMIC sprayer or add one if you want to take cooling to the next level.

Fitments:

• Subaru STI 2004-2005

Notes:

• Compatible with STI models equipped with either a GrimmSpeed or OEM STI TMIC.

So if you're ready to ditch that restrictive OEM splitter and really unleash the potential of your TMIC, the GrimmSpeed splitter is a solid upgrade. Trust me, your car will thank you.