ARTEC Performance Toyota 1JZ Non VVTi T4 Twin-scroll Exhaust ManifoldARTEC Performance Toyota 1JZ Non VVTi T4 Twin scroll Exhaust Manifold 1JZ Non VVTi manifold features a split pulse T4 design Single 44 45 46mm wastegate mount included Made from 347 Stainless Steel, same material as our other manifolds 36mm ID used for the runners Single wastegate design chosen to maintain affordability Divider extends nearly to the wastegate mounting surface Easy to convert to divided or non divided by welding in a piece of material