Fuel & Air System

Arlen Ness #18-447 - Big Sucker Air Cleaner Kit - Black - Stage I

Accepts Factory air cleaner cover only.FeaturesEach hidden breather is o-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardwareStandard red filters...

Arlen Ness #18-457 - Big Sucker Stage-1 - Natural - M8

Accepts stock OEM outer cover.FeaturesEach hidden breather is o-ringed at the heads, passes through the backing plate and exits inside the mouth of the throttle body through the proprietary breather tubesHidden Breather backing plate technology is a step...

Arlen Ness #18-458 - Big Sucker Stage-1 - Chrome - M8

Accepts stock OEM outer cover.FeaturesEach hidden breather is o-ringed at the heads, passes through the backing plate and exits inside the mouth of the throttle body through the proprietary breather tubesHidden Breather backing plate technology is a step...

Arlen Ness #18-459 - Big Sucker Stage-1 - Black - M8

Accepts stock OEM outer cover.FeaturesEach hidden breather is o-ringed at the heads, passes through the backing plate and exits inside the mouth of the throttle body through the proprietary breather tubesHidden Breather backing plate technology is a step...

Arlen Ness #18-498 - Big Sucker™ Air Filter Kit - Natural - Stage I

Big Sucker™ Air Filter Kit - Natural - Stage IFeaturesEach hidden breather is o-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardwareRadius air inlet...

Arlen Ness #18-500 - Big Sucker™ Air Filter Kit - Natural - Stage I

For '93-'99 Evolution Big Twin models with CV carb.FeaturesEach hidden breather is o-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardwareRadius air...

Arlen Ness #18-505 - Big Sucker™ Air Filter Kit - Natural - Stage I

Accepts Arlen Ness® Stage I round covers only.For '01-17' Twin Cam Delphi EFI and Twin Cam CV carb models.FeaturesEach hidden breather is O-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating...

Arlen Ness #18-507 - Big Sucker™ Air Filter Kit - Chrome - Stage I

Accepts Arlen Ness® Stage I round covers only.FeaturesEach hidden breather is O-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardwareStandard red...

Arlen Ness #18-510 - Big Sucker™ Air Filter Kit - Natural - Stage I

Accepts OEM Covers.FeaturesEach hidden breather is o-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardwareRadius air inlet provides maximum...

Arlen Ness #18-511 - Big Sucker™ Air Filter Kit - Natural - Stage II

Accepts Arlen Ness® Stage 2 custom covers.Will NOT accept factory air cleaner covers.FeaturesEach hidden breather is o-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any...

Arlen Ness #18-512 - Big Sucker™ Air Filter Kit - Chrome - Stage I

Accepts OEM Covers.FeaturesEach hidden breather is o-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardwareRadius air inlet provides maximum...

Arlen Ness #18-530 - Billet Sucker and Big Sucker Replacement Hardware Kit - Stage I

For '01-'17 Twin Cam Delphi EFI and '99-'06 Twin Cam CV carb models.FeaturesReplacement hardware kit for Arlen Ness® Billet Sucker and Big Sucker air filter kitsSpecsProduct NameHardware KitModelBillet SuckerUnitsKitDesignStage IRiding StyleStreet

Arlen Ness #18-532 - Billet Sucker and Big Sucker Replacement Hardware Kit - Stage I

For '93-'99 Evolution Big Twin models with CV carb.FeaturesReplacement hardware kit for Arlen Ness® Billet Sucker and Big Sucker air filter kitsSpecsModelBig SuckerDesignStage IRiding StyleStreetProduct NameHardware KitUnitsKit

Arlen Ness #18-533 - Billet Sucker and Big Sucker Replacement Hardware Kit - Stage I

Billet Sucker and Big Sucker Replacement Hardware Kit - Stage IFeaturesReplacement hardware kit for Arlen Ness® Billet Sucker and Big Sucker air filter kitsSpecsModelBig SuckerRiding StyleStreetProduct NameHardware KitDesignStage IUnitsKit

Arlen Ness #18-535 - Billet Sucker and Big Sucker Replacement Gasket Kit

Billet Sucker and Big Sucker Replacement Gasket KitFeaturesReplacement gasket kit for Arlen Ness® Billet Sucker and Big Sucker air filter kitsSpecsRiding StyleStreetModelBillet SuckerProduct NameGasketUnitsKit

Arlen Ness #18-536 - Billet Sucker and Big Sucker Replacement Gasket Kit

Billet Sucker and Big Sucker Replacement Gasket KitFeaturesReplacement gasket kit for Arlen Ness® Billet Sucker and Big Sucker air filter kitsSpecsProduct NameGasketModelBillet SuckerRiding StyleStreetUnitsKit

Arlen Ness #18-538 - Billet Sucker and Big Sucker Replacement Gasket Kit

Billet Sucker and Big Sucker Replacement Gasket KitFeaturesReplacement gasket kit for Arlen Ness® Billet Sucker and Big Sucker air filter kitsSpecsModelBillet SuckerRiding StyleStreetProduct NameGasketUnitsKit

Arlen Ness #18-539 - Billet Sucker and Big Sucker Replacement Hardware Kit - Stage II

For '01-'17 Twin Cam Delphi EFI and '99-'06 Twin Cam CV carb models.FeaturesReplacement hardware kit for Arlen Ness® Billet Sucker and Big Sucker air filter kitsSpecsModelBillet SuckerProduct NameHardware KitDesignStage IIRiding StyleStreetUnitsKit

Arlen Ness #18-560 - Big Sucker™ Air Filter Kit - Black - Stage I

Accepts Arlen Ness® Stage I round covers only.FeaturesEach hidden breather is O-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating the need for any external hoses or hardwareStandard red...

Arlen Ness #18-561 - Big Sucker™ Air Filter Kit - Black - Stage I

Accepts Arlen Ness® Stage I round covers only.For '01-17' Twin Cam Delphi EFI and Twin Cam CV carb models.FeaturesEach hidden breather is O-ringed at the heads and exits at the mouth of the injector/carb to provide efficient engine breathing, eliminating...

Arlen Ness #18-740 - Big Sucker™ Stage I Air Filter Kit - Black

Big Sucker™ Stage I Air Filter Kit - BlackFeaturesOne-Piece aluminum backing plate with hidden breather technologyEach hidden breather is O-ringed at the heads and exits inside the mouth of the throttle body for a virtually closed loop system,...

Arlen Ness #18-741 - Big Sucker™ Stage I Air Filter Kit - Black

For '01-'17 Twin Cam Delphi EFI and '99-'06 Twin Cam CV carb models.FeaturesOne-Piece aluminum backing plate with hidden breather technologyEach hidden breather is O-ringed at the heads and exits inside the mouth of the throttle body for a virtually...

Arlen Ness #18-744 - Big Sucker™ Stage I Air Filter Kit - Black

Will Fit '88-'90 models; breather system is not applicable for these model years.For '91-'22 XL models with CV carb or Delphi EFI.FeaturesOne-Piece aluminum backing plate with hidden breather technologyEach hidden breather is O-ringed at the heads and...

Arlen Ness #18-750 - Big Sucker™ Stage I Air Filter Kit - Black

Big Sucker™ Stage I Air Filter Kit - BlackFeaturesOne-Piece aluminum backing plate with hidden breather technologyEach hidden breather is O-ringed at the heads and exits inside the mouth of the throttle body for a virtually closed loop system,...