FAST brought a really smart piece of hardware to SEMA 2025 for anyone putting boost through an LS. We all know that once you start leaning on a turbo or centrifugal supercharger, intake temperatures become the biggest enemy. The new LSXHR Intercooler is designed to fix that problem specifically for engines running the FAST composite LSXHR 103mm intake or similar Hi-Ram style plenums. It attacks the heat without forcing you to re-plumb the entire car.
A Cleaner Way to Cool
Usually, adding an intercooler means hanging a heavy core in the bumper and running feet of piping from the compressor to the nose and back to the engine. It’s messy and creates lag. This system takes a different route. The air-to-water core is designed to sandwich directly between the upper plenum and the lower runner section of the manifold. By sitting right in the middle of the intake, it cuts out all that extra tubing and fabrication work. It cleans up the engine bay and keeps the intake volume low for better throttle response.
Built for Heavy Loads
FAST didn’t make this thing delicate. It is constructed from welded billet aluminum to survive the extreme heat cycles of a race engine. To ensure it can actually flow enough water to cool a high-horsepower setup, they equipped it with large 16AN inlets and outlets. Additionally, it uses O-ring seals on both the air and water sides, so you don’t have to worry about leaks when the boost pressure spikes. The black powder-coated finish gives it a factory-style look that hides the performance capability.
The Dyno Numbers
It sounds good on paper, but FAST actually proved it on the dyno. They tested the unit on a turbocharged LSX build making 1,350 horsepower on 20 psi of boost. The results were wild: the LSXHR Intercooler pulled 198 degrees out of the charge air temperature. Even better, it did that while causing less than one psi of pressure drop across the core. Getting that kind of cooling efficiency without killing flow is a massive win for anyone chasing big power numbers.
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