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Two air filters compared

filter apexi k&n


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Two air filters compared

Comparing two filters. On the right the A'PEXi Power Intake which did a good job at around 300HP but is way too restrictive for 380HP, the bigger turbo charger has been choked from 1.8 down to 1.4bar with this filter. Using the left one, a K&N RC-3690 cured this.
Never beforre thought filters could act so restrictive!