Overview  

The UEM Piston 1FZ 103/105mm Stroke Flat is a precision-forged piston tailored for Toyota 1FZ-FE engines fitted with a 105mm stroker crankshaft. With a 103mm bore and flat-top crown, it’s engineered to optimize compression for naturally aspirated or mildly boosted applications. The flat-top design promotes efficient combustion and smooth flame travel, resulting in enhanced power delivery and throttle response. Built from high-strength forged materials, this piston is made to endure the rigorous demands of motorsport, off-road, and high-performance driving. Its durable construction allows it to handle high thermal and mechanical stress, making it a dependable choice for performance enthusiasts.

Features

• Fits Toyota 1FZ-FE engines with 105mm stroker crankshafts

• 103mm bore size increases displacement and improves performance

• Flat-top crown boosts compression and enhances combustion efficiency

• Ideal for naturally aspirated and mildly boosted setups

• Constructed from high-strength forged materials for maximum durability

• Designed to withstand high heat and pressure in racing and off-road conditions

• Improves throttle response and overall power output