Iam not too sure about the 465 size? They are Racing Beat so I sure they must run good, but in their catalog they dont show too much horse power coming from their 465 set up? Also, they dont share any secrets about what they do to them. I dont have any experience with the RB 465, but do have a non rotary 600, that seems to run pretty damn good for $150 new off of ebay. With the jets and metering block a little over $200. I would like to see RB beat that!