Purpose of Separation: By splitting these duties, the engine achieves better timing control, more precise fuel delivery, reduced stress on individual camshafts, and smoother combustion.
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Key Features and Technical Specs
Improved Combustion Chamber: Designed for better air/fuel mixing using swirl-inducing intake ports and a centrally located injector to reduce puddling.
Enhanced Cooling: Features large water jackets surrounding high-heat zones (especially exhaust valves) to prevent hot spots, warping, and cracking.
Material Quality: Often constructed with high-nickel content cast iron to prevent cracking between valves. Premium aftermarket options may include Inconel valves and hardened seats for extreme heat resistance.
Valve Configuration: Engineered for durability with nitrogen-hardened valve seats to withstand high pressures and heat from EGR systems.
Can be order with all inconel intake valves and fire rings for performance applications. Fits 1999-2000 model.
