Prism Supply Bristol Breather - CV Tumbled Battery Boxes but it's not required if

but it's not required if you choose to allow your ThunderMax to "learn" the correct settings your specific motorcycle wants after choosing the correct base map Hundreds of maps available for various models

and rectifiers

Machined from 6061 aluminum and given a factory matched matte black powder coat

it's built to stand up to the vibration and ride a rigid bike with a V-twin can produce

Common 108mm caliper pitch

Prism Supply Bristol Breather - CV Tumbled Battery Boxes but it's not required ifPrism Supply Bristol breather for Keihin CV (Polished) If youre trying to keep your bike slim and looking clean, the Bristol Breather is for you. No more big clunky air cleaners on your carbkeep it simple with this bird catcher for your CV carburetor. The Bristol is made of aluminum and features a stainless steel mesh screen that flows a ton of air. Proudly made in Charlotte, North Carolina.