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i would cut the factory air box, do an LT2 manifold and get a reputable tune on the car. it will remain quiet and remove most of the factory choke points. should gain around 30 whp & 30 wtq. budget friendly, easy to do and drive/sound completely stock.
i think doing headers + cats from there would be in the neighborhood of $100-150 per hp depending on brand. subjective value. as well as add noise.
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2016+ camaro: everyone’s first car
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