Big Sucker® Stage 2 air cleaners retain all the performance gaining features of the Stage 1 plus a 20% larger filter fore even more airflow. Each Stage 2 features our patented hidden breather backing plate that is o-ringed at the heads and exits inside the mouth of the throttle body, eliminating the need for any external hoses or hardware

• Smooth Cover Style 
• Increases Horsepower & Torque 
• 20% Larger Filter Than Stage 1 
• Patented Hidden Breather Technology 
• One-Piece Aluminum Backing Plate 
• Radius Air Inlet for Unobstructed Airflow  

PERFORMANCE AIR FILTER:

• Each Big Sucker performance filter is handmade in the USA 
• 20% larger filter then Stage 1 
• Performance filters are available in red pre-oiled cotton or synthetic elements
• Red pre-oiled cotton performance filters are made from 4 layers of surgical grade cotton.  Filters are washable/re-useable, filter service kits are available separately

(1) Silver steel air cleaner cover

(1) Air filter

(1) Chrome aluminum backing plate

(2) Back plate gaskets

(1) Spacer gasket

(2) Breather bolts (w/small hole)

(2) Breather bolts (w/large hole)

(4) Clear plastic plugs

(3) 1/4"-20 x 1-1/4" Set screws

(3) Standoffs

(3) 1/4"-20 x 1/2" Button head bolts

(4) O-Rings

(2) 1/2" Flat washers

(2) 5/16"-18 x 1-1/2" Socket cap bolt

(2) 5/16" Flat washers

(1) Loctite 243

Instructions