Dual plane manifolds are designed for the ultimate in low and mid RPM ranges and, with the dual plane design, performances carries into the high RPM range. These aluminum manifolds have standard Holley mounting flanges and are intended for fresh water use only. Purchase the hard-coat anodize option for salt water use. Manifolds can also be Fusioncoated with one of our custom colors. Holley BB Chevrolet Oval Port (0-5200rpm)
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