It depends on what you plan on doing, if you intend on doing forced induction or stay naturally aspirated.
If you go the FI route, are you planning on turbocharging or supercharging. For turbos, maybe you can purchase the FI 3" TDX exhaust, for the supercharger, purchase the long tube headers and exhaust. Neither of which will need an intake, as they offer their own intake plumbing, it's a waste of money.
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