JE TOYOTA 1FZ-FE PISTON BORE 100.25 MM CH 1.653 PIN D. 0.905 LOW -22 PIN L. 2.500 CR 7.5 EN COATING P/N 354429

Description

This part number (P/N 354429) refers to a high-performance JE Pistons set specifically engineered for the Toyota 1FZ-FE engine—the legendary 4.5L straight-six found in the Land Cruiser (80 and 100 Series).
​Based on the specs you provided, this is a heavy-duty forged piston designed for forced induction (turbocharging or supercharging) where high boost and lower compression are required for engine safety and maximum power.
​Technical Specifications Breakdown Bore Size 100.25 mm +0.25mm overbore; requires a fresh cylinder hone/bore.
Compression Height (CH) 1.651″ The distance from the pin center to the piston crown.
Wrist Pin Diameter 0.905″ Standard heavy-duty pin sizing.
Wrist Pin Length 2.500″ Provides ample engagement for high-load applications.
Dish Volume -22cc Deep dish design to significantly drop compression.
Compression Ratio (CR) 7.5:1 Ultra-low CR; perfect for high-boost “monster” builds.
Coating EN Coating Electroless Nickel (EN) plating for superior heat and wear resistance. 1. Built for Boost
​The 7.5:1 Compression Ratio is the standout feature here. While the factory 1FZ-FE runs higher compression, this “low-comp” setup allows you to run massive amounts of boost on pump gas or race fuel without the immediate risk of detonation (knock). It’s the “gold standard” spec for 1,000+ HP 1FZ builds.
​2. Forged Strength
​JE uses high-strength 2618 Aluminum Alloy. Unlike factory cast pistons, these are designed to be “malleable” under extreme pressure, meaning they are much more likely to survive a tuning hiccup rather than shattering.
​3. EN Coating (Electroless Nickel)
​The inclusion of EN Coating is a premium touch. This isn’t just for looks; it provides:
​Enhanced Thermal Barrier: Protects the piston crown from intense combustion heat.
​Reduced Friction: Improves the longevity of the piston skirts.
​Corrosion Resistance: Useful if you are running aggressive fuels like E85 or Methanol.
​4. Precision Engineering
​The 100.25 mm bore size indicates these are intended for a rebuild where the block is being “cleaned up.” The slightly larger diameter ensures a perfect seal and restores the factory cylinder geometry.