If you remove the airbox on a honda shadow with a single carb, the carb will have a hard time creating enough negative vacuum and the air will be far too turbulent in the venturi to pull in a steady flow of fuel from the pilot and main jet the solution to this issue? Velocity Stacks! This allows the carb throat to be lengthened enough so that the engine can maintain vacuum beyond the slide of each carb, as well as allow the air turbulence to be reduced. resulting in a much smoother delivery of air and fuel to your engine.
You will need to purchase a performance jet kit with your stack to achieve the desired results. The kits you find online will not work with these! You can find the proper jet kits HERE
WITH PROPER TUNING, THESE WILL NOT HARM YOUR BIKE, NOR WILL THEY ALLOW ANYTHING HARMFUL INTO YOUR MOTOR!
Each stack comes with a brass screen to keep out birds, cigarette butts and small children. Each stack is attached with 3 small set screws. The screens keep out anything big enough to harm your motor, they don't even let sand through. Even if you live in a dusty area or a on a dusty road, the stacks will not allow anything harmful into your motor. They run great in all weather. Do not add any other means of filtration to the stacks.
Solid Brass Stacks Available in - Polished, Raw, or Bead Blasted Finish Aluminum Stacks Available in - Polished, Raw, Gloss Black or Matte Black Finish
These are not a PLUG-N-PLAY item. You will have to tune your bike once you install these stacks. There's lots of good info online on how to tune and my Youtube videos explain the process pretty well. Youtube channel is TJBRUTALCUSTOMS
These may not fit some of the Aero models or Phantoms with EFI. If you have a carbureted model, these stacks will fit. Turn around times are between 1-6 weeks.