If you remove the air box on a Honda Shadow with dual carbs, the carbs will have a hard time creating enough negative vacuum to pull in a steady flow of fuel from the pilot and main jet. The solution to this issue... Velocity Stacks! They allow 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 our performance tuning kit with your stacks to achieve the desired results. The kits you find online will not work with these! You can find our in-house performance jet kits HERE.
Each stack comes with a metal mesh filter screen to keep out birds, cigarette butts, and small children. These don't even let sand through! The stacks function in all weather. Do not add any other filtration to the v-stacks! Each stack is attached with 3 small set screws. Dual carb stacks come 2 to a set.
To install, put the screen on the carb, then slip the stack on and tighten the set screws. We recommend using a locking agent such as loc-tite to secure the set screws WITH PROPER TUNING, THESE WILL NOT HARM YOUR BIKE, NOR WILL THEY ALLOW ANYTHING HARMFUL INTO YOUR MOTOR!
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 on how to tune on our Support Page and YouTube videos explain the process pretty well. Our YouTube channel is TJBRUTALCUSTOMS.
Will not fit pre-98 VT750 models. Turnaround times are between 2-6 weeks, depending on workload.