Exhaust manifold intended for: Alfa Romeo 155 2.0 Q4 TurboWorks exhaust manifold made of 100% stainless steel. Guaranteed power increase of up to 10%. cylinder goes to the exhaust manifold, which is part of the engine body, then to the first section of the exhaust pipe, then to the muffler, or several silencers arranged in series, and then to the exhaust part of the exhaust pipe. The kit includes a set of gaskets. the product comes with a 24-month warranty. & nbsp