Knuckle Stage 1 Big Sucker™, Black
Big Sucker™ Stage 1 air cleaners are engineered and proven to give your engine maximum airflow for more horsepower & torque. The patented hidden breather backing plate is o-ringed at the heads and exits inside the mouth of the throttle body for a virtually closed loop system, eliminating the need for any external hoses or hardware
- Knuckle Stage 1 Air Cleaner Cover
- Increases Horsepower & Torque
- Patented Hidden Breather Technology
- Pre-Oiled & Synthetic High Performance Filters
- One-Piece Aluminum Backing Plate
- Radius Air Inlet for Unobstructed Airflow
California Air Resource Board: Executive Order D-639-12_R-01
California Prop 65:
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ALUMINUM BACKING PLATE FEATURES: TWIN CAM/SPORTSTER
- One-piece aluminum backing plate
- 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 unobstructed airflow directly into the engine
- Matte black powdercoat finish
Knuckle STAGE 1 AIR CLEANER COVER
- The Knuckle Stage 1 cover features 3d sculpted design that extents from the face of the air cleaner to the sides of the air filter pleats
- CNC machined from billet aluminum
- Black anodize finish
PERFORMANCE AIR FILTERS:
- Each Big Sucker performance filter is handmade in the USA
- Available in red pre-oiled cotton or synthetic filter media
- Standard red pre-oiled cotton performance filters are made from 4 layers of surgical grade cotton for optimum flow & filtration
- Synthetics performance filters are made from a black synthetic filter element that is wrapped in a stainless steel jacket. Synthetic filters are water resistant and do not require oil
- All Stage 1 air filters are washable/re-usable, filter tune-up kits are available separately
99-17 TWIN CAM (EXCEPT: FBW)
- 2001-2017 Twin Cam Delphi EFI (Fuel Injected)
- 1999-2006 Twin Cam CV Carb
- *NOTE: Will not fit Fly-By-Wire Models: 08-17 FLT Touring / 16-17 Softail / 16-17 Dyna FXDLS & 99-01 F.I. FLT
08-16 TOURING / 16-17 SOFTAIL (FBW)
- 2008-2016 FLT Touring / Bagger - FLHT / FLHR / FLHX / FLTR / H-D FL Trike
- 2016-2017 Softails
- 2016-2017 Dyna FXDLS
- 2014-2015 FLSTNSE / 13-14 FXSBSE / 11-12 FLSTSE
- *NOTE: Twin Cam models equipped w/ FBW (Fly-by-Wire or Throttle-by-Wire)
91-UP XL SPORTSTER
- 1991-up Sportster 883 / 1200 with CV Carb or Delphi EFI
99-01 FUEL INJECTED FLT
- 1999-2001 FLT Touring Models- FLHTI / FLHRI
TWIN CAM / SPORTSTER / EVOLUTION
BLACK BACKING PLATE (FITMENT SPECIFIC)
08-16 Touring / 16-17 Softails: 18-590
99-17 Twin Cam (Exc. FBW & 01 FI): 18-591
99-01 Fuel Injected (FI) FLT: 18-593
88-up XL Sportster: 18-594
HARDWARE KIT (FITMENT SPECIFIC)
08-16 Touring /16-17 Softails: 18-530
99-17 Twin Cam (Exc. FBW & 01 FI): 18-531
99-01 Fuel Injected (FI) FLT: 18-533
88-up XL Sportster: 18-534
AIR FILTER, RED PRE-OILED
08-16 Touring / 16-17 Softails (FBW): 18-080
99-17 Twin Cam/88-up XL: 18-098
99-01 Fuel Injected (FI) FLT: 18-097
AIR FILTER, SYNTHETIC
08-16 Touring / 16-17 Softail (FBW) : 50-083
99-17 Twin Cam/88-up XL: 50-084
99-01 Fuel Injected (FI) FLT: 50-087
KNUCKLE AIR CLEANER COVER, BLACK: 18-769
COVER HARDWARE, 5/16-18 X 5/8: H-525C
Warning:
