GDUKOP LS High-Volume Oil Pump & Timing Chain Kit — 4.8–6.0L LS V8, +18% Flow, gasket set

If you're rebuilding or refreshing an LS-family engine, this all-in-one kit gives you the core components needed for timing and oil delivery in one purchase. Designed for 4.8L, 5.3L, 5.7L and 6.0L LS V8 engines, the kit fits many popular Chevy, GMC, and Cadillac platforms — including Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche, Trailblazer and Escalade. It bundles a timing chain, cam and crank sprockets, a timing cover gasket set, plus a high-volume oil pump engineered to increase oil flow over standard pumps.

What parts are included and how do they match OE references?

The kit supplies the timing chain, cam sprocket, crank sprocket, timing cover gaskets and the high-volume oil pump all packaged together for a coordinated installation. Each part is chosen to fit common LS engine assemblies and aligns with OE part numbers to simplify sourcing and verification.

• Included: timing chain, cam and crank sprockets, timing cover gasket set, high-volume oil pump
• OE references: 12557840, 12696357, 12586665, TCS45993 for cross-checking fitment
• Designed to match mounting points and clearances for LS1, LS2, LS3, L96, LM7, LR4, LQ4 engines

How does the high-volume oil pump change engine lubrication?

The upgraded pump is built to deliver roughly 18% more oil flow compared with typical replacement pumps, which improves oil availability at idle and under load. Enhanced circulation helps maintain pressure in worn engines or those operating with higher demands, supporting component longevity when installed correctly.

• Approximately 18% increased oil flow versus a standard pump
• Improved idle oil pressure and better flow during heavy-duty use
• Recommended pump priming and pickup-tube O-ring inspection during installation

Will this kit fit my vehicle and what engines are supported?

The kit is tailored for LS-series V8s: specifically 4.8L, 5.3L, 5.7L and 6.0L displacements and engines including LS1, LS2, LS3, L96, LM7, LR4 and LQ4. It fits many GM trucks and SUVs when the engine family and year use the same timing cover and pump configuration.

• Compatible with Chevy, GMC and Cadillac applications such as Silverado, Sierra, Tahoe, Yukon, Suburban, Avalanche and Escalade
• Confirm engine code and OE part numbers before ordering to ensure exact fit
• Not universal — verify compatibility with vehicle build sheets or VIN cross-reference

What should I know before installation?

Professional installation is recommended to ensure timing alignment, correct gasket sealing and proper oil-pump priming. Inspect the pickup-tube O-ring and torque specifications, and replace any related seals or fasteners to prevent leaks or premature wear.

• Prime the oil pump before initial start-up to avoid dry-start damage
• Inspect and replace the pickup-tube O-ring if worn or brittle
• Use factory torque specs for sprockets and timing cover bolts; verify timing alignment after assembly

Who is this for: This GDUKOP kit is intended for mechanics, engine rebuilders and enthusiasts refreshing or upgrading LS-series V8 engines — especially high-mileage, rebuilt or higher-load applications that benefit from improved oil flow. If you need a coordinated timing and oil delivery refresh with OE cross-reference support, this kit provides the main components to complete the job when combined with proper installation procedures.