manifoldsmanifold classifications tech p/n 8120 manifold ... 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 ... plustm series 180° low-rise dual-plane manifold designed as a stock replacement ... manifold with improved power and torque ... the effective rpm range of this style manifold is off idle through approximately 5500 ... s top-of-the-line high-rise dual plane manifold combines the low-end throttle response ... series 360° single-plane open plenum manifold designed primarily for high-performance ... street drag marine and oval track use with an effective ... primary tubes being a mid to high-rpm manifold a standard transmission or an automatic ... the ultimate street/strip performance manifold for single 4v applications where ...