Description
Built for serious rebuilds. Trusted for real-world work.
The PDI Big Boss In-Frame Overhaul Kit for CAT C12 engines features laser-hardened top ring grooves for extended piston life and long-term reliability.
Rebuild with confidence. When your C12 needs an in-frame, the PDI Big Boss Overhaul Kit delivers premium internal components designed to restore compression, reliability, and service life—without the downtime or cost of a full teardown.
Built for high-hour, high-load applications, this kit is trusted by engine builders, fleets, and owner-operators who demand durability beyond standard replacement parts.
Why Builders Choose Big Boss
• Complete in-frame solution for CAT C12 engines
• Laser-hardened top ring grooves for increased piston durability
• Precision-engineered components for consistent compression
• Built for heavy-duty, high-mileage applications
• Backed by PDI’s Big Boss Warranty
What’s Included in the Kit
This PDI Big Boss In-Frame Overhaul Kit includes the critical components required for a professional in-frame rebuild:
• (6) Cylinder Kits (pistons, liners, and rings)
• (6) Rod Bearing Sets
• (6) Piston Oilers
• (1) Main Bearing Set
• (1) Upper Gasket Set
• (1) Oil Pan Gasket
Designed for Real-World Performance
Every component in this kit is engineered to meet the demands of real-world heavy-duty use—long hours, sustained loads, and high operating temperatures. Big Boss overhaul kits are built to go beyond standard rebuild expectations, helping extend engine life and protect your investment.
Fitment & Compatibility
Fits:
• Caterpillar C12
Why PDI?
PDI designs and manufactures heavy-duty diesel engine components trusted by professionals across the industry. From overhaul kits, cylinder heads, injectors and supporting components, every product is built with a focus on strength, precision, and long-term reliability.
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