Description

FN2 Toda Racing Exhaust Manifold 18100-FN2-000

K20Z (FN2) CIVIC TypeR

In order to get the best performance, engine power, efficiency, this exclusive exhaust manifold design takes into consideration not only the special characteristics of the K20Z engine but also the results of an extensive bench testing program.
-Racing purpose only (The catalyst can NOT be installed) -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. -Racing high flow junctions design* Each section of the manifold has optimized pipe lengths, diameters and angles as well as high flow junctions. -With the service adapter for A/F sensor -Made of light weight stainless steel for both durability and looks -Flange manufactured by high precision machining center	Reference performance data from the overseas distributor (Torque Developments International PLC).[Specification] Exhaust manifold: TODA vs Standard Exhaust system: Other maker Air filter: Other maker ECU: Hondata FlashPro (Tuned by TDI)

The specification decided by engine bench testing & actual racing.

Engine bench testing & actual racing
FN2 Toda Racing Exhaust Manifold manufactured by TODA racing are used in competition. Ideal lengths, diameters, and shapes are determined using the feedback data from racing and continual bench testing.

Ideal 4-2-1 design　
For ultimate power the 4-1 type exhaust manifold design is the one to use. The problem is that power is only made from 4,500 rpm in the process removing drivability. TODA racing have designed 4-2-1 system which restores drivability 15 % more torque* with only 1.5% loss of power*.
*TODA 4-1 bench testing manifold used for comparison.

As used on all the latest 4-cylinder racing engines the 4-2-1 gives best result.

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FN2 Toda Racing Exhaust Manifold