Below is a listing of the different styles and series of manifolds offered by Weiand. The information listed will help you decide which manifold will suit your particular application and needs. ACTION PLUS SERIES: 180°, dual-plane manifold designed as a stock replacement manifold with improved... (more)
TECH DISCUSSION ABOUT DISPLACEMENT, VOLUMETRIC (VE) EFFICIENCY, AND CFM FORMULA FOR VE VE = (CFM X 3456) ÷ (CID X RPM) If VE (volumetric efficiency) is less than 1... (more)