Hooker BlackHeart LS Turbo Cast Iron Exhaust Manifold - Black Ceramic Coated - GM LS-Series H769001M Has expansion rate very similar

Has expansion rate very similar to cast iron

but its good to know that you have the oomph to make it happen

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Hooker BlackHeart LS Turbo Cast Iron Exhaust Manifold - Black Ceramic Coated - GM LS-Series H769001M Has expansion rate very similarThese Hooker BlackHeart LS Turbo Exhaust Manifolds are the simple solution for adding a turbo to your muscle car. They are made from High Silicon Moly ductile iron, have a natural cast finish and are much more durable than fabricated headers. A turbo cross over tube is available for manifold connection (sold separately). A universal cross over component kit is also available for custom applications (requires fabrication & welding). These manifolds are