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The C8s were designed to work up to 8500rpms (from what JWT tells me). The cams are agressive yes, but nothing to agressive for these turbos since the owner wants more top end power. The cams do not need any clearanceing of the head, unlike the more aggresive C9.
do i have to pull the motor to do the swap or is it direct replacement (bolt-on with SS manifold ) . what would it cost to upgrade to bigger turbos !!
I dont think you have to pull the motor, but it might be faster to do so. The reason I sold my PE kit was to make more power. I didnt know until after I sold my kit that you can upgrade the 1320's.
I can see your point, but im right promise. The cams will make the engine more efficent, which in turn will help in power at the same boost level. The power increase will probably not be that substantial, but it will still be there.