S&S Cycle 84-99 BT Super Stock Cylinder Heads - Wrinkle Black Aluminum Finish

If you're working on a 1984-1999 Harley-Davidson Big Twin engine, especially one with S&S V-Series 4-1/8" bore crankcases, these S&S Cycle Super Stock cylinder heads are a solid choice for a significant performance upgrade. They're built to handle the airflow demands of larger displacement engines, giving your motor the breathing room it needs to make serious power. The wrinkle black finish is a nice touch, helping them blend in with your existing black engine components for a clean, factory-look appearance.

These heads feature substantial 2.000-inch intake valves and 1.605-inch exhaust valves, paired with S&S's own port designs to ensure excellent airflow. They're specifically machined to accommodate the S&S 4-1/8" cylinder stud pattern found on their special application crankcases. You'll also find they're prepped for either electric or manual compression releases, which is a practical consideration for easier starting on high-compression builds. The manifold mounting surface is machined to stock specs, meaning you can use your existing intake manifold and throttle body setup, though you might need a special length manifold or throttle body if your engine height isn't stock.

For those looking to push the limits with camshaft upgrades, the included S&S High Performance valve springs are rated to handle camshafts with up to .650-inch lift, offering a good range of options for tuning. These heads are designed to work with your stock rocker boxes, exhaust, and intake manifolds, simplifying the installation process. Keep in mind that these are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for complete details on fitting these to your specific engine build.