Power + Plus is the newest line of high performance Chevrolet intake manifolds available. They incorporate many new features not found in other brands. Features like dual distributor holddowns, four corner water ports, nitrous bosses, water divider baffles, carburetor adapter plates and special manifold adapters for later model heads.
All Power + Plus manifolds are cast in a high pressure steel die rather than pour-in sand molds as used by all other manifold manufacturers. This type of tooling costs two or three times what conventional sand cast patterns cost, but the finished product is worth this additional expense. And because the cores which form the internal ports and water passages are mounted in steel instead of sand during the casting process, there is no chance of any core shifts, which sometimes go undetected in sand castings. Core shifts can cause misalignment between the ports and the heads, or even actual air or water leakage. That is one problem you will never have to worry about wtih Power + Plus. Each manifold is subjected to a very thorough pressure test that will detect any air or water leakage. Power + Plus intake manifolds are manufactured in a modern factory which produces OE aluminum manifolds for several major auto makers.