The Indy guys shouldn't sell to the public but they do give the customer that option which most manufactures don't do.
I am a V-Twin dealer {Harley parts}, V-Twin will not sell to the public, period.
The minimum order I have to make with V-twin is $50.00.
Its not that big of a deal IMO to come up with a few extra parts to make the minimum order, a set of headers and intake gaskets a back up set of oil line hoses. {can't imagine replacing only one?}
We are the minority that have had good luck with the Indy guys.
Purchase from a dealer they may even give you a discount the supplier will not do that.
Have a great 4th and win lots of races this weekend if your racing.