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Message: <blockquote data-quote="Paul" data-source="post: 1105602" data-attributes="member: 9404">Despite what your "calibrated butt" tells you, there is no empirical data to support your claims. Using your example of slapping a single plane manifold on a stock or near-stock 289/302, I guarantee that you lost power AND torque, and made the car slower.To answer your question about "why people care about low-end torque" - it's because of math. Horsepower, oversimplified, is calculated as torque/time. The faster you can make torque, the more horsepower you make.Regarding the Cartech, I've seen many dyno tests over the years (since I started following this stuff, probably around the year 1999/2000) that prove empirically, with actual testing and dyno data, that the long-runner manifolds significantly outperform box and short-runner manifolds in stock and mildly modified combinations.Sorry, but on this topic, you're just wrong.Paul.</blockquote>