If you plan on purchasing a turbo kit from a company for our cars, then no, you don't need to do any extra modification besides from what's included with the kit (and maybe the exception of probably doing some tuning on the dyno to get a good A/F ratio). If you plan on going more than stock boost (usually 5-7psi), then it would be recommended to build up the internals of the bottom end so the engine could handle it.
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