Intakes for Honda 450 heads to increase the mounting flange area.  Machined by Judges Performance as a snug fit.
 
*Recommend using sealant when installing and Locktite on set screws.  We stock the intakes for the 1.965" flange (the most common diameter of the intake flange on the 450 heads).  Measure yours and if it is a different outside diameter, let us know and we can have it machined.