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The S&S CYCLE High Compression Replacement Head (Part Number 106-6059) is designed to enhance the performance of Evolution Big Twin motorcycles. Fully assembled, this head features stainless steel valves and high-lift springs to ensure durability and reliable operation under demanding conditions. Its optimized port design increases airflow while maintaining velocity, contributing to improved power and efficiency. This head is ideal for smaller displacement engines and is compatible with stock-style flat-top pistons, making it a versatile upgrade for riders seeking enhanced performance. Set up for a maximum lift of .585 inches, it supports high-performance camshaft profiles for aggressive tuning. The head is EFI compatible, allowing seamless integration with electronic fuel injection systems for precise fuel delivery. Made in the USA, this component offers quality craftsmanship and reliable performance. Please note that intake manifold and gasket kits are sold separately, allowing customization based on your specific setup. Whether upgrading for increased horsepower or better throttle response, this head provides a significant upgrade option for your Evolution Big Twin engine.
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