Tomei - Expreme Turbo Manifold - Nissan - Silvia S15(TC)Specifications: Manufacturer: Tomei Reference Number: 193086 Exhaust Type: Turbo Manifold Material Used: Stainless Steel For the TOMEI EXPREME SR20 exhaust manifold, a partition plate is provided inside the turbine side port, and the exhaust port is divided for No. 1 and No. 4, No. 2 and No. 3. Since the ignition order of the sequential ignition SR20 DET is 1 ? 3 ? 4 ? 2, the exhaust is alternately discharged from the left and right sides of the