Toda Racing Exhaust Manifold Race Version (4-2-1 SUS) - Toyota - Levin Trueno AE86Specifications: Manufacturer: Toda Racing Reference Number: 18100 860 999 Type: Header Material: Stainless Steel Original 2000 version of the 4 2 1 design. For ultimate power the 4 1 type exhaust manifold design is the one to use basically. The problem is that power is only made from 4,500 rpm in the process removing drivability. TODA racing have designed a 4 2 1 system which restores drivability 15% more torque* with only 1. 5% loss of power* This