What kind of tires are you running? Don't forget, you've changed your unsprung weight, which directly affects everything performance wise. Assuming there is nothing broken or worn out on your car, it's just wheel/tire combo thats just too heavy for your current shocks. But as some others mentioned, I'd make sure nothing else is broken or worn out. As the likelyhood of wheel hop in third and fourth is unlikely as you'd need 500+ hp to get that situation. Also wheel speed sensor could be thrown off as the diametre of the front is different from the rear given the staggered size and profile.
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