Designed for performance Thunder Mfg. allows your bike to breathe. Thunder Mfg. Airkits are also very stylish and add class to any motorcycle. All airkits require the use of a Thunder Mfg. adapter. (read more)

All our BAK filter covers are available separately so you can alter the look of an existing BAK by replacing the cover (read more)

…require use of on Arlen Ness die cast cover or Stage I Billet Sucker cover.Fits: Harley Davidson models with the Arlen Ness Big Sucker Air Kit installed.Note: Full Air Kit pictured this part number will only order the cover pictured. (read more)

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This filter is made in the USA. A Hi-Flow pleated air filter that is pre-oiled for the ultimate in style and performance. The Big Sucker Kits and air filters work great with the Big Shot fuel tuner which is available separately. Filters are designed to accept chrome and black outer covers that are available… (read more)

Pictured: Pro-R Hypercharger sold seperately (read more)

Not for the faint of heart our new Skull Air Cleaner kits are a vile and sinister addition to any bad-ass ride. The outer cover is the same high-strength extremely rigid composite cover we sell for SS carbs. These kits also include a backing plate and high-flow filter element as well as any necessary… (read more)

…power source - Maintain tire pressure save tread increase mileage - Modular kit stores easily watershock- resistant case - Only 2.75 lbs.- Save time - dont get stranded - Save money - avoid tow trucks Kit Includes:- Powerful Air Compressor - Permanent Battery Connection - Universal Connections - Alligator… (read more)

…a new exhaust system may change your motorcycles fuel-air mixture requirements. Please consult the manufacturer directly with questions regarding any modifications that may need to be made during or after installing their product. If a jet kit or EFI controller is recommended please see the IntakeFuel… (read more)

Precision instrument to help with jetting Works on all engines and all fuels except nitro-methane Measures approximate airfuel ratio L.E.D. read out Mounts on any flat surface (read more)

…AWESOME Kit comes complete with stylized chrome cover jet kit KN filter and all necessary hardware. Any of our chrome filter covers can be purchased separately for those who want to alter the look of their existing Baron.For added value and protection we include our BAK Raincoat with each kit. A 29.95… (read more)

…efficiency. Dyno-tested and flow-bench designed kit will add substantial increases to horsepower and torque. Beautifully chromed and decoratively milled covers available in several designs. MassFlo reusable filter and BAK-Plate dynamically increase air flow and velocity. Innovative design enhances and… (read more)

Low and Mean has created a Honey Comb Air filter screen kit for the Force air filters. This simple bolt-on accessory offers a additional style and function. While taking your eye off the standard pinkish red filter and or saggy dry sock this screen adds a more industrial finish. And while all that is… (read more)

…90 Degree Stack and 90 Degree Air Filter. All chrome plated. Pre-filters available for extra protection against water and debris. Pre-filters do not lower performance of velocity stack kits. Note: SS 113 engines require the SS 107 and under kits. Velocity stack kits will not fit HD 103 engines. (read more)

…improve air flow to the throttle bodies Integrated Aluminum Power Cones reduce turbulence and increase air load velocity Proprietary High Flow Airaid reusable filters for long life Provides a deeper healthier roar System cleanly integrates under the fuel tank and replaces bulky stock air box assembly… (read more)

Thunder Mfg.s adapters are designed for performance. We also strive to make our products easy to install and use. Note that when changing your airkit you will need to use an electronic fuel control system. If you already have a Powercommander you must remap it for the Thunder Airbox. Likewise if… (read more)

…your bike with increased air volume Improves engine and fuel efficiency X-poses your engine and brings out its aggressive nature 3-D mesh X cover is beautifully styled and adds interest Machined from T-6061 billet aluminum and beautifully black anodized Complete hardware kit and instructions included… (read more)

…below the bars.Kit Includes:Wheel Sensor: Yamaha ATV Yamaha Rhino Z400KFX400DVX400 Bombardier Polaris TrailBlazer1350mm wire lengthDigital Gauge Magnet Kit . Temperature Sensor: Cylinder Head Temp Sensor 12mmWire length: 550mm 21in....For 12mm spark plug or bolt fitment on many air cooled off-road machines… (read more)

…functions much like a main jet on a carburetor. This third tuning option is for use with engines that have high flow air filters and or extensive modifications such as big-bore kits higher compression or other performance increases where more fuel is required in order for the engine to run properly… (read more)

Replacement End Cap Kit for Kuryakyn Corsair Air Cleaners. (read more)

…for those who want to alter the look of their existing BAKFor added value and protection we include our BAK Raincoat with each kit A 29.95 valueI bought a Barons Big Air Kit for my bike because I liked the looks. I wasnt concerned about getting more performance but WOW My bike sure has a new attitude… (read more)

…compressor. Mounts with one bolt included in kit. Produces a powerful dual tone air horn sound that is two times 2X louder than the factory horn. The Bad Boy is compact in size to fit any car truck motorcycle and any 12-volt vehicle that wants a loud air horn sound 118 db 2 meters. With bright chrome… (read more)

…engine Set back thin-line design does not interfere with riders leg Hi-flow reusable filter and specially-designed back plate dynamically increases air flow and velocity Maximizes overall performance and fuel efficiency Easily supports engines producing over 120 HP Fuel injected bikes do NOT require… (read more)

Besides providing a ton of bang for the buck the legendary air cleaners perform as well as they look. These kits provide what you need for uncomplicated installation on your new fuel injection system. You have the monstrous motor now let it perform like one (read more)

…Crankcase breather vents filter kit PART 14-20900 features a one-piece chrome-top filter hose clamp and die-cast mounting base accepts 38 inch i.d. hose Replacement filter with chrome die-cast cap PART 14-20905 is for use only with crankcase breather vent filter kit PART 14-20900 Black rubber-top crankcase… (read more)

The latest in air horn technology one-piece design that requires no hoses. Installs in minutes by simply transferring the factory horn wires to the compressor. Mounts with one bolt included in kit. Produces a powerful dual tone air horn sound that is two times 2X louder than the factory horn. The Bad… (read more)

…provides your bike with increased air volume Improves engine and fuel efficiency X-poses your engine and brings out its aggressive nature 3-D mesh X cover is beautifully styled and adds interest Machined from T-6061 billet aluminum and beautifully chromed Complete hardware kit and instructions included for… (read more)

…adds a beautiful blast of style to your engine area. Dyno-tested and flow-bench designed this kit adds substantial increases to horsepower torque MassFlo reusable filter and BAK-Plate dynamically increase air flow velocity Maximizes overall performance and fuel efficiency Innovative design enhances and… (read more)

Since their introduction for H-D Models in 1992 The Hypercharger has been widely recognized as one of the most cost effective performance modifications available. When the demand arose for adaptation to the Metric Cruisers we expected similar performance increases but never expected to see the gain… (read more)

…filtered air to enter the end of the filter.- The revised teardrop center cover provides larger slots for improved air flow and a cleaner look.All these improvements add up to improved air flow and greatly improved power potential.Note: These kits contain an all-chrome Twin Velocity Plus mounting kit and… (read more)

…hardwareEach kit is designed to accept our chrome and black outer covers that are available separatelyKits are available with standard pre-oiled red air filter our stainless steel jacketed SS pre-oiled filter for the ultimate in style and performanceThe best bang for your buckThese kits were great with… (read more)

…provides your bike with increased air volume Improves engine and fuel efficiency X-poses your engine and brings out its aggressive nature 3-D mesh X cover is beautifully styled and adds interest Machined from T-6061 billet aluminum and beautifully chromed Complete hardware kit and instructions included for… (read more)