The stock over pipe on the FR-S and the BRZ is not only too narrow but it also has flattened sections which severely limit the performance gains from adding go-fast parts such as an exhaust or an aftermarket manifold, like the Expreme Tomei Manifold.
The new Tomei Expreme Over Pipe retains a continuous 60.5mm design, eliminating any flat spots on the pipe itself. The pipe also has additional welded beads inside of the unit to increase rigidity and durability. If have the Tomei exhaust, you can further upgrade the system by installing this over pipe to gain more flow. Additionally, you can also upgrade to the Tomei exhaust manifold to improve the response on your turbocharger.
