Smooth Stage 2 Big Sucker™, Black
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 Stage 2 Cover
- Increases Horsepower & Torque
- 20% Larger Filter Than Stage 1
- Patented Hidden Breather Technology
- Pre-Oiled High Performance Filters
- One-Piece Aluminum Backing Plate
- Radius Air Inlet for Unobstructed Airflow
California Air Resource Board: Executive Order D-639-12
California Prop 65:
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Air Cleaner Backing Plate:
- Made from aluminum and finished to spec by CNC machine
- The backing plate's one-piece design features our patented hidden breather technology, each breather is o-ringed at the heads and exits at the mouth of the throttle body. This creates a virtually closed look system which eliminates the need for any external hoses or hardware
- Smooth radius air inlet engineered to provide maximum airflow directly into the engine
- Available finishes: Standard Raw / Chrome / Black Powdercoat
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 Black cotton /Stainless steel jacket
- 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
- Black cotton /Stainless steel jacket performance filters are made from a black oiled cotton filter element that is wrapped in a stainless steel jacket. Black cotton /Stainless steel jacket require oil, they are also washable/re-useable
Air Cleaner Covers and Components:
- Smooth Stage 2 custom cover
- 99-17 Twin Cam (Exc. FBW & 99-01 FI FLT)
- 08-16 FLT / 16-17 FLST & FXDLS (FBW)
- 91-up XL Sportster
- 93-99 Evo (Evolution)
- 99-01 FI (Fuel Injected) FLT
Backing Plate (Fitment Specific)
08-16 FLT/16-17 FBW Softail & Dyna: Black 18-590
99-17 Twin Cam (Exc. FBW & 01 FI): Black 18-591
99-01 Fuel Injected (FI) FLT: Black 18-593
93-99 Evolution: Black 18-592
88-up XL Sportster: Black 18-594
Hardware Kit (Fitment Specific)
08-16 FLT/16-17 FBW Softail & Dyna: 18-539
99-17 Twin Cam (Exc. FBW & 01 FI): 18-539
99-01 Fuel Injected (FI) FLT: 18-542
93-99 Evolution: 18-541
88-up XL Sportster: 18-543
Stage 2 Air Filter, Red Pre-Oiled
08-16 FLT/16-17 FBW Softail & Dyna: 18-081
99-17 Twin Cam/88-up XL/93-99 Evo/99-01 FI FLT: 18-099
Stage 2 Air Filter, Synthetic
08-16 FLT/16-17 FBW Softail & Dyna: 50-085
99-17 Twin Cam/88-up XL/93-99 Evo/99-01 FI FLT: 50-086
Smooth Stage 2 Air Cleaner Cover, Black: 18-771
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