Exhaust manifold for turbo designed for: Honda Prelude H22 Exhaust manifold by TurboWorks, made of cast iron When tuning the engine, the exhaust manifold should be replaced at the very beginning, because the exhaust gases extruded from the cylinder go to the exhaust manifold, which is part of the engine body, then they are directed to the first section of the exhaust pipe, then to the silencer, or several silencers placed in series and then to the exhaust pipe outlet. We also offer lambda probe adapters that eliminate the catalyst error. Additional accessories are also available for exhaust manifolds: & nbsp