Check your intake gaskets if you still have the factory throttle body support bracket. What happens when they break is the seal of the intake gets broken and the cylinder, if the front runs lean and gets hot, thus burning the exhaust valves and possible cracking the head. The rear can do the same although the Oxygen sensor that richens a lean mixture is located on the rear pipe. Since your throttle body bracket was broken, might as well do a wet/dry compression test, post results here if you like. If compression is good, replace intake gaskets, remove repaired throttle body bracket, place in right hand, throw as far away as you can, get an Air Filter backing plate from a Vendor and install after you have replaced intake gaskets.
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