I used the stock 450 radiators. The left, had the lower pipe moved and the guy welded it in the wrong spot. It works but doesn't have the angle or routing I would like.
The 02 KX250 airboot I got. Just didn't like how it was around the shock. The Honda boot was a bit smaller. Running a reed spacer so my carb is back a bit more than stock. And the Honda boot lined up. Made an adapter plate for the stock 450 airbox. See if I got a pic of the box all bolted together but off the bike.