High flow cats(catalyc converter) is one of exhaust system pipe which free up the stucked exhaust gas by stock cat you are looking for about 4-500$ for it
Intake about same prices as HFC
Turbos.... You will find price if you type down "370z turbo" on google anyway base line is $10k to do most any forced induction(turbo, supercharger)
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NOR CAL TT Z34
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