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When building a Subaru WRX for 300-400 horsepower, selecting the right intercooler size is crucial for optimal performance. An intercooler helps reduce the temperature of the air entering the engine, improving efficiency and power output. In this article, we will explore the best intercooler sizes for WRX builds in this horsepower range.
Understanding Intercooler Functionality
Before diving into specific sizes, it’s important to understand how an intercooler functions. An intercooler cools the compressed air from the turbocharger before it enters the engine. Cooler air is denser and contains more oxygen, which leads to better combustion and increased power. The efficiency of an intercooler can significantly impact your vehicle’s performance.
Factors to Consider When Choosing an Intercooler
- Horsepower goals
- Space constraints in the engine bay
- Type of driving (street, track, or off-road)
- Budget considerations
- Installation complexity
Recommended Intercooler Sizes
For WRX builds aiming for 300-400 horsepower, the following intercooler sizes are recommended:
- Top-Mount Intercoolers (TMIC):
- Size: 20-24 inches wide
- Benefits: Easier installation, retains factory look
- Drawbacks: Can heat soak under heavy load
- Front-Mount Intercoolers (FMIC):
- Size: 24-30 inches wide
- Benefits: Better cooling efficiency, less heat soak
- Drawbacks: More complex installation, may require additional piping
Top-Mount Intercoolers (TMIC)
Top-mount intercoolers are popular among WRX enthusiasts due to their straightforward installation and compatibility with stock setups. Here are some recommended TMIC options:
- Process West Verticooler:
- Size: 21.5 inches wide
- Features: Lightweight, efficient cooling, direct bolt-on
- Grimmspeed TMIC:
- Size: 22 inches wide
- Features: High-efficiency core, reduced pressure drop
Front-Mount Intercoolers (FMIC)
Front-mount intercoolers are ideal for builds pushing higher horsepower. They provide superior cooling and performance. Here are some top FMIC choices:
- COBB Tuning FMIC:
- Size: 24 inches wide
- Features: Large core, optimized end tanks for airflow
- ETS Front-Mount Intercooler:
- Size: 30 inches wide
- Features: High-flow design, excellent cooling efficiency
Installation Considerations
When installing an intercooler, consider the following:
- Ensure proper fitment in the engine bay
- Check for any required modifications to the bumper or piping
- Consider professional installation if you’re unfamiliar with the process
Conclusion
Selecting the right intercooler size for your WRX build is essential for achieving your horsepower goals. Whether you choose a top-mount or front-mount intercooler, ensure it meets your performance needs and fits within your budget. With the right intercooler, you can unlock the full potential of your Subaru WRX.