Edelbrock part #2814 Super Victor Vortec Bowtie intake manifold is designed specifically for use with GM cast-iron Vortec Bowtie cylinder heads #25534351 (185cc) and #25534371 (215cc). It features raised runners that closely match the port shape and location of these heads and is the best choice for racing classes that prohibit modification to the manifold. It features the original 6-bolt pattern and 7/8" inch of additional carb pad height (compared to previous raised-runner manifolds such as #2926).