These custom-manufactured, diamond-forged lightweight pistons are engineered specifically for 4.0L engines, delivering uncompromising strength and precision for both naturally aspirated builds and high-pressure forced induction setups. Whether you're running turbo, nitrous, or supercharged configurations, these pistons are designed to hold your engine together under extreme conditions without sacrificing responsiveness or weight efficiency.
 
Each piston features a forced pin oiler system that channels lubrication directly from the oil ring to the wrist pin, ensuring consistent cooling and reduced friction during high-RPM operation. The pins are precision-fitted for optimal load distribution, and the skirts are moly-coated to minimize wear and scuffing against the cylinder walls—especially critical during cold starts and aggressive throttle transitions.
 
The 3D pocketing design reduces unnecessary mass while preserving structural integrity, allowing for faster revs and cleaner combustion. Every set includes wrist pins and locks, so you're not chasing down hardware when you're ready to install. 
 
These pistons are available in standard oversizes—0.010, 0.020, 0.030, and 0.040—giving you flexibility for rebuilds, overbores, or custom tuning.
 
Built for builders who demand repeatable performance and legacy-grade durability, these pistons are more than just components—they’re the foundation of your next breakthrough. Whether you're chasing podiums or building a reliable street legend, this set is ready to take the hit and keep firing.