Review on AEM 21 840C Cold Intake System by Tim Thompson
Disappointing performance for a premium filter
The AEM Cold Intake System may have a sleek design and promise improved airflow, but in reality, the difference in performance is negligible .Based on my observations, the installation process was tedious and the promised horsepower boost was nonexistent. The only plus is the potential slight increase in fuel efficiency. However, for the premium price I expected better results..
- Potential slight increase in fuel efficiency
- Minimal performance improvement for the cost.
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