Description
Nissan TB48 “Monster” +1.5mm Oversize Engine Valve Kit
Elevate your TB48 build with the “Monster” 1.5mm Oversize Valve Kit. Engineered specifically for high-displacement, high-boost, and competitive drag or desert racing applications, these valves are designed to maximize the volumetric efficiency of the Nissan 4.8L cylinder head.
By increasing the head diameter by 1.5mm, this kit significantly expands the curtain area of the valve, allowing for massive increases in airflow that standard valves simply cannot provide.
Core Specifications
Oversize Diameter: +1.5mm larger than OEM intake and exhaust heads.
Material Composition: * Intake: Forged EV8 Stainless Steel for high-strength induction.
Exhaust: High-temp Inconel or Nimonic alloy to withstand extreme EGTs in turbocharged setups.
Stem Treatment: Black Nitride coating for reduced friction, superior heat dissipation, and minimal guide wear.
Architecture: Waisted/tapered stem design to further reduce airflow restriction near the port.







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