No me I would go with a set of 4-2-1 header's first after that remove almost ever restricting stuff on the exhuast system.( Unless you are getting a turbo )Cat back exhuast first 2'' to 3'' diameter pipe . I'm running 2 3/4'' pipe

Then get the aftermarket intake; New upgrade injectors ; then upgrade the spark plug wires to a low resistance set ; great aftermarket coil from MSD.