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

Description

Toda Racing B16 Spec B Camshaft Set – Intake & Exhaust

The Toda Racing B16 Spec B camshaft set is designed for builders looking to move beyond drop-in camshafts and extract stronger high-rpm performance from their DOHC VTEC engine. Compared to OEM and Spec A camshafts, Spec B increases VTEC lobe duration and lift, shifting the powerband upward and improving airflow at higher engine speeds.
This camshaft set is intended for performance-focused street and track builds where supporting modifications are in place.
Compared to OEM Type R camshafts, Spec B offers a substantial increase in both duration and lift on the VTEC lobe, allowing the engine to continue making power well past the factory power curve. Compared to Spec A, Spec B further increases the aggressiveness of the high cam profile, favoring top-end power and sustained high-rpm operation. While low-cam behavior remains controlled, Spec B is optimized for engines that spend more time in VTEC.

Due to the increased lift and rpm capability, upgraded valve springs are required when running Spec B camshafts. Proper valvetrain setup is essential to maintain reliability at higher engine speeds.

Camshaft specifications

Intake cam
Low cam (non-VTEC): 230° duration / 6.5 mm lift
High cam (VTEC): 300° duration / 12.0 mm lift
Center (lost motion): 250° duration / 9.5 mm lift
Exhaust cam
Low cam (non-VTEC): 230° duration / 6.0 mm lift
High cam (VTEC): 290° duration / 11.5 mm lift
Center (lost motion): 250° duration / 9.0 mm lift
Compared to Spec A, Spec B increases both duration and lift on the VTEC lobe, enabling greater airflow and improved power retention at higher rpm.

OEM Type R cam comparison

OEM B18C5 / B16B 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 B camshafts represent a clear step beyond OEM Type R profiles, particularly in VTEC duration, making them better suited for engines with ported cylinder heads, upgraded intake manifolds, and freer-flowing exhaust systems.
Compatible VTEC cylinder heads
B16A
B16B
B17A
B18C (GSR and Type R variants)

Included

Intake camshaft
Exhaust camshaft

Part numbers

Intake cam: 14111-B16-00B
Exhaust cam: 14121-B16-00B