4" Screw on Filter Assembly Kit w/115 Micron Element with P#485 Retainer.

This unit is perfect for engines producing up to 1200Hp 

(Screw on disposable  Filter not included) 
Use Disposable filters: 
FRAM: PH30 OR PH13
K&N HP-2002 OR HP-3002
WIX 51069 OR 51060