Overview 

The 1FZ cast iron crankshaft with a 116mm stroke and skinny RB30 journal sizing is a durable and cost-effective upgrade designed to boost displacement and torque in Toyota 1FZ-FE engines. Constructed from high-quality cast iron, it provides reliable strength for naturally aspirated and mild forced induction applications. The extended 116mm stroke significantly increases engine capacity, making it ideal for torque-focused builds like off-roading, towing, or endurance racing. Featuring the smaller RB30 journal size, this crankshaft reduces bearing friction and overall rotating mass, allowing for improved engine responsiveness and higher RPM capability. Precision machining ensures accurate journal tolerances and proper fitment. While not as strong as forged or billet options, its lightweight “skinny” design balances performance gains with durability, making it a popular choice for high-displacement street and competition engines that don’t require extreme boost levels.

Features

• 116mm stroke significantly increases engine displacement and torque output

• Cast iron construction offers durability and cost-effectiveness for naturally aspirated and mild boost applications

• RB30 journal sizing (skinny profile) reduces bearing friction and rotational mass for improved engine response

• Precision machined journals ensure accurate tolerances and proper fitment

• Lightweight “skinny” design helps improve RPM potential and throttle response

• Ideal for torque-focused builds such as off-road, towing, and endurance racing

• Suitable for high-displacement street and competition engines without extreme boost demands