Weiand Action Plus Mechanical Water Pumps are available with a stamped steel impeller that provides optimum water flow, while consuming less horsepower than stock pumps. The impeller also limits high rpm cavitation and will not crack, corrode, or fatigue like aluminum impellers can. Action Plus aluminum pumps weigh approximately 30 to 50 percent less than stock iron pumps. Fits 1969-87 Chevrolet Big Block and some 1988-91 heavy-duty trucks with Mark IV engines. Does not fit Corvettes or 1-ton trucks.

The Weiand Company was founded in year 1930s as a performance parts warehouse by Phil Weiand and sold different types of speed parts. The "High Weiand" manifold was the company's first product manufactured and introduced to the market in 1937 as the first aluminum intake. In 1952 they introduced their famous "Drag Star" line of "log" manifolds for Hemi engines. The company developed a complete blower drive in 1957 for the GMC 6-71 supercharger, while their first dual plane 180-degree intake known as "Colt" was launched in 1965. Weiand introduced "Hi-Ram Manifold" in 1968 with its patented D-port technology.

The company launched the "X-terminator" single plane manifold series in 1972; the following year Weiand introduced high-performance aluminum water pumps. In 1974, X-CELerator, a single plane intakes, was developed. The famous "Team G" 360-degree racing manifold series was launched in 1978, and a year later, the "Action" series of high-performance replacement manifolds was introduced.

Today, Weiand continues to be a trailblazer in the automotive industry, providing top-grade performance products to enthusiasts worldwide.