High rise intake manifold are ideal for drag race applications since they are easy to install and remove. They are also less likely to develop leaks than stock manifolds since there are no fasteners to seal against and they can be easily cleaned in case of fire on the track. The increased air flow produced by a high rise manifold will also improve acceleration by reducing turbo lag and improving power on the starting line. In addition, less exhaust gases are trapped in the cylinder during combustion and the exhaust system runs cooler which reduces the amount of carbon buildup inside the pipes. You can buy from link below – https://www.totalperformance.net.au/Single-Plane-Intake-Inlet-Manifold-Victor-JR-BBC-Chevy-Big-Block