Product Description
The 574145/D Valve, EX is a genuine OEM replacement part manufactured to meet the high-performance demands of Royal Enfield’s 411cc LS engine. This exhaust valve is responsible for releasing spent combustion gases from the cylinder into the exhaust manifold.
Crafted from high-grade, heat-treated steel alloy, this valve is designed to resist carbon buildup and “tuliping” under the heavy thermal loads typically experienced during long-distance touring or off-road riding. As seen in image_e3ed20.png, the valve features a precision-ground stem and face to ensure a gas-tight fit against the valve seat, which is vital for maintaining fuel efficiency and engine power.
Key Features:
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Precision Engineering: Perfectly balanced stem-to-head ratio for smooth operation at high RPMs.
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High Thermal Durability: Specially alloyed to handle the intense heat of exhaust gases without warping.
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OEM Reliability: Guaranteed compatibility with the Himalayan and Scram cylinder heads, avoiding the seating issues often found with aftermarket valves.
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Optimized Performance: Ensures proper compression cycles, leading to smoother idling and better throttle response.
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Genuine Packaging: As shown in image_e3ded0.png, the product comes with a QR-coded security label for authenticity and was manufactured in 11/2025.
Technical Specifications:
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Part Number: 574145/D
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Compatibility: Royal Enfield Himalayan 411 (BS3, BS4, BS6), Scram 411.
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Component Type: Exhaust Valve (VALVE, EX).
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Material: High-Temperature Engine Grade Steel.
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Country of Origin: India.










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