Toyota 1JZ Non VVTI T4 Split PulseOur 1JZ Non VVTi manifold is a split pulse T4 design with a single 44 45 46mm wastegate mount. It uses 36mm ID for the runners made from the same 347 Stainless Steel all of our manifolds are made with. We went with a single wastegate design to keep costs down as well as keeping the divider continuing almost all the way down to the wastegate mounting surface. This makes it easy if you want to have it divided or non divided, just simply weld in a piece