Are you still confused as to which parts you need to get the performance you want? Quit wasting time and second-guessing yourself. Trick Flow® for your GM LS has already done the work for you with their Top-End Engine kits. Designed and dyno-tested to deliver the performance you crave for less than purchasing the parts separately, these kits save time and money! What's in these GenX® Top-End Engine kits?* A pair of Trick Flow® GenX® street/strip cylinder heads* A specially matched hydraulic roller cam* Some kits contain roller rocker arms* Pushrods* Head gaskets* Head bolts* Exhaust gaskets* Balancer bolt