The Qualifier EFI Manifold System for 5.0L and 351W Fords is an ideal performance upgrade for your Mustang or other vehicle with one of these engines. This manifold is suitable for high performance street use, bracket racing, nitrous, or supercharged applications. The 5.0L System is sold as a complete kit with both the lower manifold and upper plenum in one package. However, if you have a 351W engine, you need to buy the 351W manifold and the upper plenum separately. Note that our Upper Plenum will bolt to an Edelbrock #3821 or #7126 manifold. If a customer already has an Edelbrock setup it is an easy and economical swap to bolt on one of our polished upper plenum units.
Speedmaster has become a leader in its field, built on a long term consistency of being a specialist in aftermarket automotive components. The team has shared all the finest moments in the numerous accolades for its people, its products, and its approach. Speedmaster is also one of the rare companies to produce its own products, where majority items are entirely developed and manufactured in its workshops. The ultimate token of precision, Speedmaster is the worldâ€™s only major parts manufacturer to equip cars from Standard replacement to Top Fuel Dragsters.
In 1979, the company was founded with Peteâ€™s Performance, which was a small speed workshop. It began by building engines for customers as a hobby, and it has now grown to include selling, assembling, manufacturing and racing high performance engine parts. Over the years, the company has grown into a worldwide high performance powerhouse. Growing from a one-man bricks-and-mortar business; to now a supply chain in which en