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Thumbnail Filmstrip of Duramax 2001-2016 Roller Lifter SBI VL573 Images
The SBI VL573 Roller Lifter is a precision-engineered valvetrain component designed specifically for the rigorous demands of the GM 6.6L Duramax platform. Spanning engine generations from the 2001 LB7 through the 2016 LML and LGH, this mechanical roller lifter serves as a critical interface between the camshaft and the pushrods. Unlike standard automotive components, these lifters are built to a strict 1.180" body diameter and an overall length of 3.330", ensuring exact fitment and structural integrity within the engine block. By utilizing a roller follower configuration, the VL573 reduces friction at the camshaft lobes, which is vital for maintaining timing accuracy and longevity in high-torque diesel applications.
- Mechanical Roller Design: Engineered as a solid, non-hydraulic component to provide a direct, rigid link in the valvetrain for maximum lift consistency.
- Precision Dimensions: Features a 1.180" body diameter and 3.330" length for a seamless drop-in fit in compatible 6.6L Duramax blocks.
- Manual Calibration: As a mechanical lifter, this unit requires precise external lash adjustment during the installation process to ensure optimal valve clearance.
- Comprehensive Replacement: These components are sold individually, though a full engine service requires a total quantity of 16 units.
- Quality Assurance: Each lifter is backed by a 1-year limited manufacturer warranty, offering peace of mind regarding material and workmanship standards.
Understanding the distinction between hydraulic and mechanical lifters is essential for a successful Duramax overhaul. Because the SBI VL573 is a non-hydraulic "solid" lifter, it does not use oil pressure to automatically take up valvetrain slack. This design choice is often preferred in heavy-duty environments because it eliminates the risk of "pump up" or "collapse" at high RPMs, offering more predictable valve timing. However, it is imperative that the installer performs a manual lash adjustment to account for thermal expansion. By choosing the VL573, you are investing in a durable, performance-oriented solution that maintains the mechanical soul of the Duramax engine while meeting or exceeding original fitment specifications.
Specifications:
- Length: 3.330
- Body Diameter: 1.180
- Type: Mechanical Roller
Note: Qty of 16 roller lifters required per engine.
The SBI VL573 Roller Lifter is a precision-engineered valvetrain component designed specifically for the rigorous demands of the GM 6.6L Duramax platform. Spanning engine generations from the 2001 LB7 through the 2016 LML and LGH, this mechanical roller lifter serves as a critical interface between the camshaft and the pushrods. Unlike standard automotive components, these lifters are built to a strict 1.180" body diameter and an overall length of 3.330", ensuring exact fitment and structural integrity within the engine block. By utilizing a roller follower configuration, the VL573 reduces friction at the camshaft lobes, which is vital for maintaining timing accuracy and longevity in high-torque diesel applications.
Mechanical Roller Design: Engineered as a solid, non-hydraulic component to provide a direct, rigid link in the valvetrain for maximum lift consistency.
Precision Dimensions: Features a 1.180" body diameter and 3.330" length for a seamless drop-in fit in compatible 6.6L Duramax blocks.
Manual Calibration: As a mechanical lifter, this unit requires precise external lash adjustment during the installation process to ensure optimal valve clearance.
Comp[...]
The SBI VL573 Roller Lifter is a precision-engineered valvetrain component designed specifically for the rigorous demands of the GM 6.6L Duramax platform. Spanning engine generations from the 2001 LB7 through the 2016 LML and LGH, this mechanical roller lifter serves as a critical interface between the camshaft and the pushrods. Unlike standard automotive components, these lifters are built to a strict 1.180" body diameter and an overall length of 3.330", ensuring exact fitment and structural integrity within the engine block. By utilizing a roller follower configuration, the VL573 reduces friction at the camshaft lobes, which is vital for maintaining timing accuracy and longevity in high-torque diesel applications.
- Mechanical Roller Design: Engineered as a solid, non-hydraulic component to provide a direct, rigid link in the valvetrain for maximum lift consistency.
- Precision Dimensions: Features a 1.180" body diameter and 3.330" length for a seamless drop-in fit in compatible 6.6L Duramax blocks.
- Manual Calibration: As a mechanical lifter, this unit requires precise external lash adjustment during the installation process to ensure optimal valve clearance.
- Comprehensive Replacement: These components are sold individually, though a full engine service requires a total quantity of 16 units.
- Quality Assurance: Each lifter is backed by a 1-year limited manufacturer warranty, offering peace of mind regarding material and workmanship standards.
Understanding the distinction between hydraulic and mechanical lifters is essential for a successful Duramax overhaul. Because the SBI VL573 is a non-hydraulic "solid" lifter, it does not use oil pressure to automatically take up valvetrain slack. This design choice is often preferred in heavy-duty environments because it eliminates the risk of "pump up" or "collapse" at high RPMs, offering more predictable valve timing. However, it is imperative that the installer performs a manual lash adjustment to account for thermal expansion. By choosing the VL573, you are investing in a durable, performance-oriented solution that maintains the mechanical soul of the Duramax engine while meeting or exceeding original fitment specifications.
Specifications:
- Length: 3.330
- Body Diameter: 1.180
- Type: Mechanical Roller
Note: Qty of 16 roller lifters required per engine.