D1 Spec Lightweight Pulley – B series

D1 Spec Lightweight Pulley – B series

Less Weight, More Response – Subtle Gains with Smart Engineering
The D1 Spec Lightweight Pulley is designed to reduce rotational mass and engine drag, offering a mild but noticeable improvement in throttle response — especially when paired with other performance upgrades. Ideal for drivers looking to squeeze more efficiency out of their setup without major modifications.

Features:

Lightweight alloy pulley for reduced rotating mass

Slightly improves throttle response and engine rev speed

Direct OEM replacement

Anodized for corrosion resistance and durability

Best used in combination with intake, exhaust, or ECU upgrades

Designed for daily drivers and street builds