Procharger ATI Bellmouth Assembly keeps your impeller from getting damaged, and does not restrict airflow while doing so!
3.75"=3PCAI-101) Commonly Fits: P600B, P-1SC, P-1SC-1, P-1X, P-1SC-2, D-1, D-1SC, D-1X, F-1D, F-1, F-1A, F-1A-91
4.00"=3PCAI-102) Commonly Fits: F-1A-94, F-1C, F-1R
4.50"=3PCAI-121) Commonly Fits: F-2
5.75"=3PCAI-141) Commonly Fits: F-3R-130, F-3R-136, F-3R-140
