S&S Cycle Billet Heads — 2006-2012 Harley-Davidson Dyna 4

S&S Cycle Billet Heads are precision-engineered replacement cylinder heads for 2006-2012 Harley-Davidson Dyna models. Built from billet material for superior strength and designed to bolt directly in place of stock heads for increased displacement and performance.

Features

• Billet construction for strength
• Direct bolt-on replacement for stock Dyna heads
• Engineered for 2006-2012 Harley Dyna 4-stroke engines

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 900-0966
• Weight: 13.04 lb
• Category: Engine Components / Heads

Fitment

Fits 2006-2012 Harley-Davidson Dyna 4-stroke engines.

Frequently Asked Questions

Will these heads fit my 2013+ Dyna?

No — this part is engineered specifically for 2006-2012 Dyna models. 2013+ Dynas require a different part number.

Are these a direct bolt-on replacement?

Yes — these heads are designed to bolt directly in place of stock Dyna heads without adapters or modifications.

What displacement increase do these provide?

S&S Cycle billet heads are designed to work with various piston and bore combinations for displacement gains. Consult S&S documentation for your specific build.

Do I need to re-tune after installing these heads?

Yes — a fuel and air recalibration is recommended after head replacement to optimize performance and drivability.