Edelbrock Manifold Bottom Victor RamEdelbrock part #7070 Victor Ram 23 degree for Small Block Chevy is a tunnel ram manifold base for the control of high velocity mixture flow, especially above 8500 rpm. Suited to drag race engines operating at 6500 10,000 rpm and race boat engines above 7000 rpm. Does not fit raised port cylinder heads or 1987 and later cast iron heads. Installation Instructions Warranty