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Wehrli 4" dry media air filter for use with WCFab kits is a replacement filter with a 4" inlet; it’s a non-washable DRY element intended to be maintained with compressed air. Inspect the pleats every 5,000 miles and replace the filter every 15,000–30,000 miles depending on conditions. The filter offers airflow comparable to cotton elements while protecting the engine from debris.
Wehrli Universal 4in Inlet Dry Air Filter (Use w/WCF Kits)
