Mitsubishi Lancer Ralliart 4B11T Direct Replacement Exhaust ManifoldArtec direct replacement cast stainless steel turbo exhaust manifold for the Mitsubishi Lancer Ralliart 2009 2015. The biggest flaw on the factory manifold is only 3 runners reaching the collector even though its a 4 cylinder. 2 runners were merging just before the tight radius in the turbo flange area. The cracks were appearing along where the y runner met the other 2 runners. This is because twice the hot air flows in the same diameter pipe,