well i plan on getting the cervinis 4" too. never heard of the other one. all of the poeple i've talked to that have the cervinis said it fits right on. besides i live about 15 min from them,and they are 1 of if not the best fiberglass manufactures in the country. god sometimes i really love this state. shipping a hood or any glass product costs a mint.sorry for gloating.lol