S&S CYCLE - 90-1106 - Cylinder Heads - Super Stock - 89 cc - Wrinkle Black - Twin Cam
For riders who demand quality in every component, the S&S CYCLE 90-1106 is a cylinder head kit built to the standards that experienced powersports enthusiasts recognize the moment they put it in their hands. Heads are fully assembled with springs and valves. Designed for '99-'05 engines with stock crankcase, giving you a level of quality that holds up across the full service life of the component. Good for touring bikes and other heavy vehicles. Works best for motors over 103” or with high-compression pop-up pistons. Combustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock engines. Whatever the application demands, the 90-1106 gives you a component built to meet it. Sold as a pair.
Features
- Heads are fully assembled with springs and valves
- Designed for '99-'05 engines with stock crankcase
- Good for touring bikes and other heavy vehicles
- Works best for motors over 103” or with high-compression pop-up pistons
- Combustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock engines
- Large 2.000” intake and 1.605” exhaust valves maintain port velocity for good low and midrange response, but supply enough air for slightly larger engines to perform to their full potential
- S&S® High performance valve springs allow the installation of camshafts with up to .650” lift
- Intake ports flow 264 CFM (Cubic Feet per Minute) compared to stock heads at 182 CFM
- Compatible with stock rocker boxes, exhaust, and intake manifolds
- Includes heads and four long headbolts; and reuse four long OEM headbolts
- Made in the USA
- Must use S&S rocker boxes if S&S compression releases are used.
Specs
- Color/Finish: Powder-Coated
- Model: Super Stock
- Displacement: 89 cc
- Material: Aluminum
- Color/Finish: Wrinkle Black
- Product Name: Cylinder Head Kit
- Riding Style: Street
- Units: Pair
Frequently Asked Questions - S&S CYCLE - 90-1106 - Cylinder Heads - Super Stock - 89 cc - Wrinkle Black - Twin Cam
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
