If you are talking about the cdc shaker system the difference is that the 07 and up came with the factory hood scoop I beleave and the trim ring that comes with the shaker will not cover the holes left from the faxctory scoop. THis sucks for me cause Iwant this system bad but its going to cost a **** load of money for the cdc alumnium hood wit hthe cutout flange and the shaker system. Bye the way cj pony parts has the shaker system for like 750 this week only they are doing 10 percent off it was like 800 but as usual I have no money.:so
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