28" measured straight across end to end and 38" measured along the curve of the fender

and right side gas tanks on H-D 1965-1972 Big Twins

Stock part number is 82-2610 or F2610

This carburetor does not include a manifold

Installation Notes:

DIY Gas Tank Fuel Sight Gauge Kit - Clear - Chrome Fittings Gas Cap Venting_Vented 28" measured straight across endThe Lowbrow Customs DIY fuel tank sight gauge kit offers a practical and polished solution for monitoring fuel levels on your custom motorcycle. Designed for ease of use, this fuel sight glass kit is ideal for creating a custom fuel tank sight tube, perfect for choppers or Sportster builds. Made in the USA, it combines high quality components with a show ready finish, ensuring both functionality and style. With its straightforward installation