A Grimmspeed 090001 Top Mount Intercooler will not only look great in your Subaru engine bay but help make your EJ engine run more efficient. As air is pressurized by your turbo, it heats up, not because of the heat of the turbocharger, but because when they’re compressed, the atoms in the air are forced closer together and as a result, move faster and have more energy. That energy manifests itself as heat. The more heat we can remove from the system, the denser the air becomes and that’s what helps eliminate pre-detonation, or ‘knock’, allowing for increased output from your system. Your OEM TMIC does just fine at stock boost under normal use, but as soon as you start putting some real heat into it with higher boost or harder use, it heat-soaks beyond recovery.
Grimmspeed began by laser scanning an OEM TMIC to plot the mounting points and space claim in CAD with pinpoint accuracy. At the same time, Grimmspeed designed a custom bar and plate core with overall dimensions, fin density and fin types that would provide the insane heat transfer area required with minimal flow restriction. With core size nailed down, they got to work designing end tanks that offered smooth flow, perfect fitment and even distribution of the hot charge air through the core. Countless revisions were tested in flow simulation before they finally found exactly the characteristics that they wanted. From there, 3D printed prototypes were used to confirm fitment and they began work on manufacturing details in preparation for verification testing and production.
The core of any top mount intercooler is the beating heart of the beast. The intercooler cools your hot charge air in two different ways. The first is by reducing temperature by transferring heat from your hot, compressed air by conduction through the fins of the intercooler. The second is from a small pressure drop due to the flow restriction in the fins. The idea when you’re selecting an intercooler is to find one that results in an overall increase in air density. Rather than designing the largest possible core, or the core with the highest possible fin density, Grimmspeed created a well-rounded unit that’s designed specifically for Subaru’s making up to 550whp. That said, this particular core flows over 1500CFM and will support up to 575whp before it’s likely that a FMIC might be better suited for your system.
Intercooler piping is not included.
04-05 Forester XT’s require a STI BOV and STI BOV recirculation hose.
WRX/Forester models will require an OEM STI or GrimmSpeed Y-Pipe Kit