PRODUCT DESCRIPTION
Velocity Stack Kit w/ Studs, Wingnuts, & Gaskets (3447 or 3705) Aluminum Cars
If you had the aluminum front end you had a scoop which used velocity stacks. Theses stacks had no paper filter and only a wire window screen type mesh to keep the big stuff out of the carbs. This type of filtering did nothing to keep fine dirt from getting sucked in but you generally didn't encounter dirt on a race track environment with the exception of the pits so this wasn't much of a concern to racers.
Dimensions:
Outside diameter - 10"
Height -Front 3-1/2" Back 4"