S&S CYCLE - 310-0548BW - T143 Long Block Engine - '07 Harley-Davidson Screamin Eagle Ultra Classic Electra Glide, Electra Glide Ultra Classic
Built on S&S's rigid T2 case architecture, this T143 Long Block bolts into a stock Harley-Davidson FL rubber-mount chassis for '07 models without cutting or frame modification. The 4.425" bore and 4-5/8" stroke push displacement to 143ci, and S&S 635 Easy-Start gear-drive cams paired with 1.725:1 rocker arms deliver .674" of total valve lift. A built-in reed breather valve handles extreme engine loads, and heavy-duty 2-bolt exhaust flanges add structural rigidity. A model-year-specific S&S oil line kit is required separately; it's not compatible with Softail chassis.
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
- Compression Ratio: 10.5:1
- Stroke Length: 4.625"
- Riding Style: Street
- Type: Long Block
- Displacement: 143"
- Model: T-Series
- Product Name: Engine
- Color/Finish: Wrinkle Black
- Units: Each
- Color/Finish: Chrome
- Bore Size: 4.425"
Frequently Asked Questions - S&S CYCLE - 310-0548BW - T143 Long Block Engine - '07 Harley-Davidson Screamin Eagle Ultra Classic Electra Glide, Electra Glide Ultra Classic
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.
