S&S Cycle Big Twin Super Stock Cylinder Head - 91cc - Black - 900-0349

Upgrade your Harley-Davidson® big twin engine with S&S Cycle 91cc Super Stock® Cylinder Heads. Designed for optimal performance and compatibility, these cylinder heads are a must-have for enthusiasts seeking enhanced power and reliability.

Description

These S&S Cycle Super Stock® cylinder heads are specifically engineered for S&S® T-Series T2 long block engines and Harley-Davidson® big twins with S&S® 4.25" bore Hot Set Up kits installed. Featuring 2.000" intake and 1.605" exhaust valves, coupled with precisely engineered S&S® ports, these heads deliver an ample air supply to larger displacement motors. High-performance valve springs accommodate camshafts with lifts up to 0.650". They are designed to be compatible with stock rocker boxes, exhaust, and intake manifolds. The manifold mounting surface is machined to stock dimensions ensuring ease of installation. Built with pride in the USA, these cylinder heads offer a significant performance boost for your Harley-Davidson engine.

Features & highlights

• Designed for S&S® T-Series T2 long block engines and Harley-Davidson® big twins with 4.25" bore.
• 2.000" intake and 1.605" exhaust valves provide optimal airflow.
• S&S® high-performance valve springs allow camshafts with up to 0.650" lift.
• Compatible with stock rocker boxes, exhaust, and intake manifolds for easy installation.
• Manifold mounting surface is machined to stock dimensions.
• Proudly made in the USA.
• Increase horsepower and torque throughout the RPM range.

Technical specifications

• Brand: S&S Cycle
• Product Name: Cylinder Head Kit
• Displacement: 91cc
• Material: Aluminum
• Intake Valve Size: 2.000"
• Exhaust Valve Size: 1.605"
• Finish: Powder-Coated, Wrinkle Black
• Color: Black

Important to know

• A special manifold/throttle body is required for engines that are not stock height.
• Not machined for compression releases.
• Must use S&S valve cover gasket kit with stock rocker covers.
• Not compatible with '14-'16 FLHTK/FLHTKL, FLHTCUTG Twin-Cooled motors or '17-'20 touring models.