- S&S compression releases are controlled by a starter relay but the stock HD ACRs are controlled by the ECM and they do not work together properly.
- Super Stock heads will not work with S&S compression releases in a late model twin cam that has HD® ACR's already installed.
- Damage will be caused to the heads and engine if customer or dealer tries to tie into the HD® wiring.
The S&S Cycle 08-16 Touring Super Stock 89cc Cylinder Head Kit is engineered for Harley Davidson models from 2008 through 2016, offering enhanced performance while maintaining compatibility with stock crankcases. Designed to work optimally with engines of stock displacement, these heads are particularly ideal for larger stroker or big bore builds up to 110 inches, providing a significant boost in airflow and combustion efficiency. The 89cc combustion chambers deliver a slightly higher but manageable compression ratio, making these heads suitable for touring bikes and heavy-duty vehicles that demand reliable power and durability. They are machined to accommodate both electric and manual compression releases, offering flexibility for various ignition setups. The large 2.000-inch intake valves and 1.605-inch exhaust valves promote excellent port velocity, ensuring strong low- and mid-range response while providing sufficient airflow for larger engine configurations. Intake ports flow up to 264 cfm, significantly outperforming stock heads at 182 cfm, which translates to improved engine breathing and performance. Equipped with high-performance valve springs capable of supporting camshafts with up to .650-inch lift, these heads allow for further customization and power gains. Their wrinkle black powder coat finish matches the stock engine components, offering a sleek, high-performance appearance. Compatibility extends to stock rocker boxes, intake, and exhaust manifolds, simplifying installation and integration into existing systems. Please note that these heads are not carb approved and require carburetor acknowledgment during installation. They are suitable for a range of touring models, including Road King, Electra Glide, Street Glide, and Road Glide from 2008 to 2009. Proper installation and wiring are essential, and care must be taken to avoid wiring conflicts with existing Harley Davidson compression releases to prevent engine damage.
Features:
- Designed for 2008-2016 Harley Davidson touring models with stock crankcases
- Optimized for large stroker or big bore engines up to 110 inches
- 89cc combustion chamber provides higher, manageable compression
- Machined for electric or manual compression releases
- Large 2.000-inch intake and 1.605-inch exhaust valves for improved airflow
- Intake ports flow up to 264 cfm for enhanced performance
- High-performance valve springs support camshafts with up to .650-inch lift
- Compatible with stock rocker boxes, intake, and exhaust manifolds
- Wrinkle black powder coat finish matches stock engine components
- Not carb approved; installation requires carb acknowledgment
