Underdrive Crankshaft Pulley - Red
Suit Nissan 300ZX VG30
GFB pulleys are manufactured from 6061-T6 aluminium billet, making them lighter than their factory steel counterparts. How much lighter depends on the particular model, but on average the weight saving is around 2kg. This lower weight yields a large reduction in the rotating inertia, allowing the engine to accelerate faster. Additional power increases also come from making the crank pulley smaller, thereby slowing down the accessories and reducing the driven load (particularly at high RPM).
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