VALVE INTAKE*13201-9N00A – High-Performance Engine Intake Valve for INFINITI and NISSAN Vehicles This premium intake valve, model number 13201-9N00A, is a precision-engineered component designed specifically for INFINITI and NISSAN internal combustion engines. It serves as a vital element in the engine’s air-fuel management system, ensuring optimal combustion efficiency and long-term durability. As part of the valve train assembly, this intake valve works in tandem with the exhaust valve to regulate gas flow during the four-stroke cycle—intake, compression, power, and exhaust. By precisely controlling the entry of the air-fuel mixture into the combustion chamber, it directly impacts engine performance, fuel economy, and emissions output. Key Features: - OEM-grade material construction for superior heat resistance and wear longevity - Precision-machined stem and seat for consistent sealing under high-pressure conditions - Compatible with various INFINITI and NISSAN models equipped with inline-4 or V6 engines - Designed to match factory specifications for seamless integration without modifications - Enhanced thermal stability ensures reliable operation across diverse climates and driving conditions Detailed Description: The intake valve (also known as an inlet valve) operates at synchronized intervals dictated by the camshaft timing mechanism. During the intake stroke, it opens to allow a properly metered air-fuel mixture—typically from the throttle body or direct injection system—to enter the cylinder. Once the piston reaches bottom dead center, the valve closes tightly to seal the chamber, enabling effective compression. This precise timing is essential for maintaining volumetric efficiency and minimizing pumping losses. Unlike standard replacement parts, this 13201-9N00A unit undergoes rigorous quality control, including hardness testing, dimensional verification, and stress simulation, to ensure it meets or exceeds original equipment manufacturer (OEM) standards. Its hardened valve seat and durable stem coating reduce friction and prevent premature wear, making it ideal for both daily drivers and high-performance applications. Use Cases: Ideal for automotive repair shops, DIY mechanics, and fleet maintenance professionals servicing INFINITI QX50, QX60, Altima, Maxima, and Nissan Sentra, Rogue, and Pathfinder models manufactured between 2008–2020. Whether replacing worn valves due to carbon buildup, valve spring failure, or general engine overhaul, this component supports engine rebuilds, performance tuning, and preventive maintenance. It’s particularly beneficial for vehicles operating in extreme temperatures or heavy-duty environments where reliability and consistency are paramount. Customer Feedback: Users consistently report improved engine responsiveness after installation, citing smoother idling, reduced misfires, and better fuel consumption. Many note that the valve fits perfectly without requiring additional adjustments—a testament to its accurate engineering. One mechanic praised its compatibility with both stock and modified camshafts, while another highlighted how it contributed to lowering emissions during vehicle inspections. The feedback underscores its value as a dependable upgrade option for older engines showing signs of degradation. Frequently Asked Questions: What makes this intake valve different from generic replacements? It's manufactured using materials and tolerances aligned with INFINITI/Nissan OEM specifications, offering enhanced durability and consistent airflow compared to aftermarket alternatives that may compromise on metallurgy or fitment. Is this part suitable for high-mileage engines? Yes, it’s engineered to restore performance in vehicles with over 100,000 miles, especially when used during a full valve job or head gasket repair. Can I install it myself? With basic mechanical knowledge and tools such as a torque wrench, valve spring compressor, and feeler gauge, most experienced DIYers can replace it successfully. However, professional assistance is recommended if you're unfamiliar with cylinder head disassembly procedures. Does it improve horsepower? While not a performance modification per se, proper function of the intake valve ensures maximum air-fuel utilization, which can lead to measurable gains in torque and efficiency—especially when combined with other engine upgrades like upgraded spark plugs or air filters.