Since the 1930s, Weiand has been delivering serious performance parts to street / strip enthusiasts, marine customers and hard core racers. Times have changed as bigger motors, higher RPMs, better ignition systems and ultra efficient cylinder head designs have generated a need for better manifold technology.Weiand begins the development process for each manifold by evaluating all current intake designson the market. This allows us to study the strengths and weaknesses of each design. Hundreds ofhours of dyno tests are conducted to analyze the competition and determine what works andwhat doesn't.The engineering team at Weiand then generates a three-dimensional Pro-E CAD model incorporatingthe latest technology and information on flow, runner geometry, cross-sectional area,plenum design, runner length and port configuration. This information is based on 75+ years ofmanifold development experience by some of the most experienced engineers in the industry.WATER PUMPSSUPERCHARGERS