Toda Racing F20C/F22C (AP1/AP2) TODA "Torquie-kun" Exhaust Manifold (4-2-1 SUS)

Designed competition purpose for TODA standard exhaust manifold was increased more torque in a practical range.

A bench test (Equal length 4-2-1 + Taper) design
Ø45mm → Ø50mm → Ø55mm → Taper → Ø60mm
*Taper design is adopted from feedback from both racing and the bench testing.
*The 50mm diameter part of pipe in middle was extended length properly.

Racing high flow junctions design
Each section of the manifold has optimized pipe lengths, diameters and angles as well as high flow junctions.