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The Mahle OE oe piston ring set identified by manufacturer part number 42066CP is designed to restore combustion sealing and oil control when matched to the exact piston grooves and finished bore. Final compatibility depends on the exact engine and measured dimensions, not a similar vehicle name alone.
Key Features
- Moly Coated Top Ring: 1.5mm thickness cuts friction by up to 20% for smoother operation and less wear on cylinder walls.
- File-Fit Precision: 4.065 inch bore specific for perfect sealing on stock or forged pistons.
- Minimized Oil Control: Advanced Napier second ring 1.5mm and 3-piece 3.0mm oil ring keep oil where it belongs reducing consumption.
- Compatible with OEM pistons hypereutectic or forged aftermarket 4.065in bore no special hardware needed.
- Low Ring Mass Design: Lighter construction allows higher revs and quicker throttle response in LS9 LSA engines.
- Extended Durability: OE-derived materials withstand high boost and heat in supercharged 6.2L builds.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2009-2013 | Chevrolet | Corvette | Verify engine and piston or ring configuration |
| 2009-2015 | Cadillac | CTS | Verify engine and piston or ring configuration |
| 2012-2015 | Chevrolet | Camaro | Verify engine and piston or ring configuration |
Specifications
| Brand | Mahle OE |
|---|---|
| Manufacturer Part Number | 42066CP |
| Product Type | OE Piston Ring Set |
| Fitment Type | Vehicle Specific |
| Condition | New |
| Engine Displacement | 6.2 L |
| Ring Face | Moly |
What's Included
One new Mahle OE piston ring set in the exact size and configuration stated in the specifications. Pistons and installation tools are not included unless expressly listed.
About Mahle OE
Mahle supplies original-equipment and replacement pistons, piston rings, bearings, filtration, thermal-management, and engine components for professional automotive and commercial-engine service.
Related Mahle OE Products
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Frequently Asked Questions
Will Mahle OE 42066CP fit my 2009-2013 Chevrolet Corvette?
That vehicle range is listed, but compatibility also depends on the exact engine code, bore, piston design, ring dimensions, oversize, and every current MAHLE application note.
What measurements must match before ordering this ring set?
Confirm finished bore diameter, piston groove dimensions, top, second, and oil-ring thicknesses, cylinder count, ring material, and whether the set is standard or oversize.
Should the engine block be measured before installing new rings?
Yes. Measure bore diameter, taper, out-of-round, surface finish, piston groove clearance, and ring end gap in each assigned cylinder before assembly.
Installation Instructions
Use the current Mahle instructions for part number 42066CP and the engine builder's measured assembly specifications. A qualified machine shop must verify bore finish, clearances, ring gaps, piston orientation, pin fit, deck height, valve clearance, compression ratio, lubrication, torque procedures, and break-in.
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