Toda Racing B16/B18C Spec C Camshaft Set – Intake & Exhaust

Description

Toda Racing B16 / B18C Spec C Camshaft Set – Intake & Exhaust

The Toda Racing Spec C camshaft set is the most aggressive cam profile in Toda’s B-series lineup, engineered for high-output engines that prioritize top-end power and sustained high-rpm operation. Designed for serious performance builds, Spec C moves well beyond OEM, Spec A, and Spec B camshafts, delivering substantially increased lift and duration to maximize airflow at elevated engine speeds.
This camshaft set is intended for track-focused and competition-oriented builds where supporting modifications are already in place, including upgraded valvetrain components, increased compression, and improved intake and exhaust flow.
Compared to OEM Type R camshafts, Spec C dramatically increases VTEC lobe lift and duration, allowing the engine to continue making power far beyond the factory powerband. Compared to Spec A and Spec B, Spec C further prioritizes high-rpm efficiency and peak output, trading low-rpm manners for maximum performance once on the high cam. This profile is best suited for engines that operate predominantly in VTEC and are built to sustain high engine speeds reliably.
Upgraded valve springs and retainers are required when running Spec C camshafts. Proper valvetrain setup, clearances, and supporting hardware are critical for durability and performance with this cam profile.

Camshaft specifications 

Intake cam
Low cam (non-VTEC): 250° duration / 11.0 mm lift
High cam (VTEC): 295° duration / 12.5 mm lift
Center (lost motion): 250° duration / 11.0 mm lift
Exhaust cam
Low cam (non-VTEC): 250° duration / 11.0 mm lift
High cam (VTEC): 295° duration / 12.5 mm lift
Center (lost motion): 250° duration / 11.0 mm lift
These specifications represent a significant increase in both lift and duration over Spec A and Spec B, enabling maximum airflow and power retention at high rpm when paired with a properly prepared engine.

OEM Type R cam comparison 

OEM B16B / B18C5 Type R cams
Intake cam
High cam: approximately 240–243° duration / ~11.5 mm lift
Exhaust cam
High cam: approximately 235° duration / ~10.5 mm lift
When compared directly, the Toda Spec C camshafts offer a substantial increase in VTEC duration and lift, making them suitable only for engines built to support aggressive cam profiles and extended high-rpm use.

Compatible VTEC cylinder heads

B16A
B16B
B17A
B18C (GSR and Type R variants)

Part numbers
Intake cam: 14111-B16-00C
Exhaust cam: 14121-B16-00C