ARTEC TD04 CAST TUBULAR EXHAUST MANIFOLD (RAW) – CJ RALLIART

DescriptionThe 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, resulting in a runner with a much greater hot spot which causes it to expand more. Where it is cracking is where the metal is moving the greatest amount.  So when ARTEC were designing this manifold, they removed the particular hot spot by removing the restriction and/or bottle neck caused by the tight radius’ to increase flow. Features:Material: SUS347 Stainless Steel Investment Cast Construction33mm ID runners.Retains the use of the OEM heat shield (1″ Raised) and hardware.Lengthened center 2 runners for a more equal length design.