Overview

The UEM Piston 1FZ 102/105mm Stroke Flat is a precision-engineered forged piston built for Toyota 1FZ-FE engines with a 105mm stroker crankshaft. Featuring a 102mm bore and a flat-top crown, this piston is designed to support higher compression ratios, which improves combustion efficiency and power output—especially in naturally aspirated or mildly boosted setups. The flat-top design allows for cleaner flame travel and better throttle response, making it an excellent choice for high-performance street builds, off-road applications, and motorsport engines. Constructed from high-strength forged materials, it offers outstanding durability and resistance to extreme heat and pressure, ensuring reliable performance under demanding conditions.

Features

• Compatible with Toyota 1FZ-FE engines using a 105mm stroker crankshaft.

• 102mm bore enhances displacement and allows for a precise fit.

• Flat-top piston design promotes higher compression and more efficient combustion.

• Ideal for naturally aspirated and mildly boosted engines seeking improved performance.

• Forged construction delivers superior strength and long-term reliability.

• Withstands high thermal and mechanical stress common in racing and off-road use.

• Improves throttle response and flame travel for smoother, more powerful engine operation.