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it takes some additional hardware and is worth it to go with a 70mm throttle body when you do it too i was just looking into this the other day and everyone said it gives you a pretty good boost...bad thing is its like $550-600 i was looking on airram.com's site and he has a thing so you can connect the throttle body to the 08 manifold and some other things to mount the throttle cables and what not since the new ones are cableless