Built from computer-machined lightweight aluminum alloy, this fully adjustable fuel regulator allows owners of the popular GM tuned-port models to accurately get the desired fuel pressure. This not only improves maximum horsepower, but also ensures proper air/fuel ratios for optimum fuel economy. To ensure life-long quality and show stopping looks, these adjustable regulators are blue anodized and come complete with OEM-style manifold runner gaskets needed for an easy installation. Made in the U.S.A.