The Airmass Honda Acura B18 B16 B Series Race Header Exhaust Manifold is a high-performance, vintage part designed for front placement on vehicles. Made in the United States, this exhaust manifold is suitable for Honda Acura B18 and B16 engines, offering a unique in-line cross-flow cylinder head type. With its C.A.R.B. EO # D 46 certification, this race header manifold is a reliable choice for car enthusiasts looking to upgrade their exhaust system for improved performance. These are discontinued.