HCS's or Test Pipes would probably get you the most power in that price range. If you don't want to mess with that, then maybe the Stillen G3 intakes?
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Current Ride: 2012 Nissan 370Z NISMO #0389
Mods: Fast Intentions Resonated Test Pipes and TDX Exhaust with 18" Resonators (#1054), K&N Drop-Ins, GTR Start Button
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