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S&S CYCLE Super Stock® Dual Plug Cylinder Head Kit for Big Twin - Part Number 90-1491
Regular price $1,895.95 USD
Cylinder Head Kit - Super Stock® - Dual Plug - O-Ring Style - Big Twin Upgrade your Big Twin engine with the...
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Cylinder Head Kit - Super Stock® - Dual Plug - O-Ring Style - Big Twin
Upgrade your Big Twin engine with the S&S CYCLE Super Stock® Dual Plug Cylinder Head Kit, part number 90-1491. This fully assembled head set features valve seats, valves, guides, seals, and .590 inch lift valve springs, providing a substantial performance boost over stock components. The kit also includes collars, valve keepers, rocker cover gaskets, head gaskets, exhaust flange gaskets, and necessary hardware for rocker housings, top engine mount, and carb support bracket, ensuring a comprehensive upgrade. Designed to maintain a stock appearance, these heads are engineered to flow better than OEM units, optimizing airflow for improved power and efficiency while allowing the use of OEM manifolds and exhaust systems. Made in the USA, these heads combine quality manufacturing with reliable performance, making them an ideal choice for enthusiasts seeking to enhance their Big Twin's horsepower and overall engine performance.
Features:
- Fully assembled heads with valve seats, valves, guides, and seals for quick installation
- Includes .590 inch lift valve springs, collars, and valve keepers for enhanced performance
- Comprehensive kit with rocker cover gaskets, head gaskets, exhaust flange gaskets, and hardware
- Designed for dual plug ignition for better combustion efficiency
- Maintains stock appearance while improving airflow over OEM heads
- Compatible with OEM manifolds and exhaust systems for seamless integration
- Manufactured in the USA with high-quality standards
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