The stock intakes are a restriction after 6500rpm. Upgraded maf tubes and K&N intakes will bump it up mildly, but it still plateaus. I've never seen a CAI lose power anywhere against a stock setup or even post maf tubes and K&N intakes. Those are a great bang for the buck. Also, the air is no colder than the a G3 style setup. It's not in the engine bay. There are a million threads on this topic. The Z1 intakes are a great deal and better than a panel filter with post maf tubes. You won't lose power. Just don't get a short ram.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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