Call Pacifica Performance. They have a huge warehouse of nothing but mac to their ceiling. Don't go off their web site, call, they usually give better discounts over the phone.
I have those on mine, there pretty fricken loud but in a good way, haha!
Get the Durablack coated, mine still look brand new after a year and a half!
[ame="http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=53847489"]SVT Cobra Dyno B Video by *Brutal Metal* - MySpace Video[/ame]