S&S CYCLE - 310-0837BW - T143 Long Block Engine - '08-'16 Harley-Davidson Electra Glide Ultra Classic Low, Electra Glide Ultra Limited
S&S Cycle's T143 Long Block drops straight into a stock Harley-Davidson FL rubber-mount chassis on '08-'16 models with no cutting or frame modification required. A 4.425" bore and 4-5/8" stroke deliver 143ci of displacement for real horsepower and torque gains, built on the rigid T2 case with a built-in reed breather valve for extreme loads. S&S 635 Easy-Start gear-drive cams and 1.725:1 rocker arms produce .674" of total valve lift, and heavy-duty 2-bolt exhaust flanges keep the exhaust side rigid. It requires a separate model-year-specific S&S oil line kit, and it is not compatible with Softail models.
Features
- Designed to drop straight into a stock Harley-Davidson chassis without any cutting or frame modifications
- 143ci displacement delivers unmatched horsepower and torque from a 4.425" bore x 4-5/8" stroke configuration
- Built on the ultra-rigid T2 case architecture featuring a built-in reed breather valve to handle extreme engine loads
- Machined with heavy-duty 2-bolt exhaust flanges for optimized flow and absolute structural rigidity
- Loaded with S&S 635 Easy-Start gear drive cams combined with 1.725:1 rocker arms producing a massive .674" total valve lift
- Installation on all compatible models requires the separate purchase of a model-year-specific S&S Oil Line Installation Kit.
- T-Series engines are designed strictly for FL rubber-mount chassis layouts and are NOT compatible with Harley-Davidson Softail models.
Specs
- Bore Size: 4.425"
- Color/Finish: Black
- Stroke Length: 4.625"
- Riding Style: Street
- Units: Each
- Compression Ratio: 10.47:1
- Displacement: 143"
- Model: T-Series
- Product Name: Engine
- Type: Long Block
Frequently Asked Questions - S&S CYCLE - 310-0837BW - T143 Long Block Engine - '08-'16 Harley-Davidson Electra Glide Ultra Classic Low, Electra Glide Ultra Limited
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.
