waiver for the nats is now posted on the roar site. this covers the nats only but with the proliferation of engine exhaust port heights it is pointless to continue enforcing it as it is a crapshoot as to wether you are getting 4.5 or not. there are alot of different types of novarossi's entering the USA with exhausts higher than 4.5 now. If you buy a recent replacement sleeve for a nova 3 port 12 it is higher than 4.5 in many cases. so it became a moot point unless you plan to teardown every sedan motor at your club races til;l the end of the year. as this is now tyhe case expect all the manufacturers to follow suit so realistically the days of the 4.5 rule are done (the manufacturers forced it because of ifmar) even though offically within roar it does not plan to discuss a change untill 2005.