Sy-Klone Reducer Adapter for Series 9001 and 9001R 4-inch to 3.5-inch

Very helpful with deciding on what prefilter to go with. My van has never been happier

The adapter works great. Fit like a glove.

Perfect reducer for
engineaire precleaner to airflow snorkel on nissan frontier pro 4x

Make sure you verify what you paid for is what arrived! I paid extra for additional adapters.

Never got them!