This Hooker BlackHeart LS Turbo Exhaust Manifold is the simple solution for adding a turbo to your muscle car. This manifold is made from High-Silicon-Moly ductile iron, has a natural cast finish and is much more durable than fabricated headers. A turbo cross-over tube is available manifold connection (sold separately). A universal cross-over component kit is also available for custom applications (requires fabrication & welding). This manifold is part of a full line of LS swap components (i.e. motor mounts, swap oil pan, and accessory drive systems) & provides the building blocks needed to complete a custom turbo system for your GM LS engine. Patent – www.holley.com/patents/