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What can anyone tell me about these? I searched, but doesn't come back with anything? I know it's not Ashpec, or one of the other big brands, but for a guy who has Stage 3 with Downpipes, it look good enough. They say power gains are 30HP on a stock Z? Hard to believe, but maybe I'm wrong. The price seems right. If I get em, do I want to keep the ducts, and trim off the tab that they say to do?[ http://www.conceptzperformance.com/Cart/description.php?II=4638&Car_Type=300&UID=2012020408103074.130.51.1 ]
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