Subject: velocity stacks

hi guys! i have a Q, too. Keith's bike doesn't have velocity stacks, but my
eldo does what exactly is the purpose of these thangs? will they improve the
air-flow? make her run cleaner [stronger?]
seems like a while back, Mark E. said that he had several sets, some
machined down to accept K&N's. guess i shoulda paid more attention.
tia,
andy