Product Description
Maximum Strength Flexplate for High-Power L5P Duramax Builds
The ATS 305-900-4440 Billet Flexplate is engineered to handle the extreme demands of the 2017–2019 6.6L L5P Duramax paired with the Allison LCT1000 transmission. Built from 1045 billet steel and designed as a one-piece flexplate/flywheel solution, this upgrade eliminates common factory weaknesses and delivers unmatched strength and reliability.
Factory flexplates can crack or fail under high torque loads, especially in tuned, towing, or high-horsepower applications. ATS solves this issue with a precision-machined, SFI-certified billet design that withstands extreme stress while maintaining proper balance and performance.
This flexplate is ideal for performance builds, heavy towing setups, or anyone looking to eliminate a known weak point in the Duramax drivetrain.
Key Features:
- SFI certified for high-performance and racing applications
- Constructed from 1045 billet steel for maximum strength
- One-piece flexplate and flywheel design eliminates hardware failure points
- Hand TIG-welded for precision and durability
- Zinc-coated for corrosion resistance and longevity
- Handles high torque and horsepower without cracking
- Compatible with stock and aftermarket torque converters
FAQ
Why upgrade to a billet flexplate?
Factory flexplates can crack under high torque loads. A billet flexplate provides significantly greater strength and reliability.
Is this required for tuned or high horsepower trucks?
Yes, increased power levels put additional stress on the flexplate, making this a critical upgrade for performance builds.
Does this work with stock torque converters?
Yes, it is designed to work with both stock and aftermarket torque converters.
Is this SFI approved?
Yes, it meets SFI certification standards for high-performance and racing applications.
Fitment:
- 2017–2019 Chevrolet Silverado 2500HD / 3500HD
- 2017–2019 GMC Sierra 2500HD / 3500HD
- 6.6L Duramax Diesel Engine (L5P)
- Allison LCT1000 Transmission
Note: Always verify fitment and transmission configuration before ordering.
Specifications for ATS 305-900-4440
| ATS 305-900-4440 Product Specifications | |
|---|---|
| Part Number | 305-900-4440 |
| Brand | ATS Diesel Performance |
| Product Type | Billet Flexplate |
| Material | 1045 Billet Steel |
| Certification | SFI Approved |
| Transmission Compatibility | Allison LCT1000 |
| Engine Compatibility | 6.6L Duramax (L5P) |
| Vehicle Fitment | 2017–2019 Silverado / Sierra 2500HD & 3500HD |
| UPC | N/A |
| GTIN | N/A |
| Shipping Weight | Approx. 20 lbs |
| Shipping Dimensions | Approx. 17" x 17" x 3" |
| Core Charge | DOES APPLY |
| California Prop 65 | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
