You SHOULD be able to,, I would need to see a picture of the flange to be sure. but i looked at a lot of those intakes myself and noted some come with an adapter, and theres differences between the CV carb, Mikunis and S&S carbs, but many of the filters advertise they fit the early EFI intakes on sportsters and Buells.
But i see one flaw in what you wrote just now....... 1999 Sportster with EFI intake to fit my 1999 Buell S3. unless im missing something Sportsters didnt get EFI until 2004. I have a 98 Sporty and my wife has a year 2000 sporty and both came stock with a CV carb. Your Buell should be EFI and i think they started in 1998 (my 97 S1 is carb)
but again, I see many kits advertised as fitting both. So there must be some cross over to the 3 screws that typically hold these on.
A picture of your intake flange to aircleaner and i could tell you for sure.
i REALLY like the looks of the forcewinder style intakes,, that 90 deg tube with a long air cleaner just looks great.
My problem is the crazy stupid prices. I did get a super sucker kit for one of my sporty projects off of ebay cheap, but the normal retail is stupid crazy expensive. the force winder like i said is very attractive to me for cettain bikes, but i couldnt find any deals on them and i REFUSE to pay $300 dollars plus for a aircleaner.
NOT GONNA HAPPEN. I was ready to make my own, the air cleaner itself is a K&N type and retails for $34 for just the filter, I have access to metal shops, machinists and aerospace welders, i think i can come up with some Alloy tube, either aluminum or stainless for a lot less than $300.
But finally i found a lightly used kit on Feebay for a $85 Buy it now and hit it on the spot..so problem solved. (for me at least) Id like to find one more for another project i have here. but crisis averted for the time being.
On a carbed bike, pipes and air cleaner changes need tuning. A EFI like yours should adjust itself, but if not it can be tuned and adjusted thru the ECM.
On my 1997 SI tuber i still have the CV carb and it has a CV performance tuning kit in it, as well as my wifes 2000 sporty has also the CV Performance kit, I recomend them to anyone with a CV carb, but eventually my Tuber will get the Mikuni HSR kit..