Product Description
Industrial Injection PDM-360.040 Performance Cast Pistons are engineered for the 2001-2016 GM Duramax 6.6L platforms (LB7, LLY, LBZ, LMM, LML). This set is machined to .040" over (approx. +1.00 mm) to pair with a properly bored/honed block, providing a fresh sealing surface, durability under elevated cylinder pressures, and OE-style reliability for street/tow or mild performance builds.
- Part Number: PDM-360.040 (.040" over)
- Application: 2001-2016 GM Duramax 6.6L (LB7/LLY/LBZ/LMM/LML)
- Construction: Performance cast aluminum with OE-style bowl geometry
- Intended Use: Stock rebuilds, towing, work trucks, and mild performance
- Machine Work Required: Bore and hone to .040" over with correct piston-to-wall clearance
Fitment
Fits the following 6.6L Duramax engines when the cylinder block is bored/honed to .040" over and matched with .040" rings:
- 2001-2004 LB7
- 2004.5-2005 LLY
- 2006-2007 LBZ
- 2007.5-2010 LMM
- 2011-2016 LML
Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Industrial Injection |
| Part Number | PDM-360.040 |
| Bore Size | .040" over (approx. +1.00 mm) - requires bore/hone |
| Material | Performance cast aluminum |
| Included | Piston set (quantity per manufacturer's boxed set); rings sold separately |
| UPC | - |
| GTIN | - |
| Prop 65 | Yes - Cancer and Reproductive Harm. See www.P65Warnings.ca.gov |
Recommended Parts (Internal Links)
- .040" Piston Ring Set (Duramax 6.6L)
- Head Stud Kit (Duramax 6.6L)
- Complete Head Gasket/Top-End Set
- Main & Rod Bearing Sets
- Oil Pump / Oil System Service Parts
- Connecting Rods (verify pin size & compatibility)
- More Industrial Injection Duramax Components
Helpful Notes
- Block must be measured and machined by a qualified shop; always set piston-to-wall clearance to the manufacturer spec.
- Use a matched .040" over ring set and verify ring end gaps for your build (towing vs. performance).
- Prime oil system on first start and follow a proper break-in procedure.
FAQs
Do these pistons work across LB7 through LML?Yes-when your block is properly bored/honed to .040", these performance cast pistons are intended for 2001-2016 Duramax LB7/LLY/LBZ/LMM/LML applications. Always verify bowl style and pin/rod compatibility during assembly.
Are piston rings included? No. Rings are sold separately. Choose a .040" ring set and file end gaps to your target use-case.
What machine work is required? At minimum, a .040" over bore and torque-plate hone with correct piston-to-wall clearance. Check deck height, liner protrusion (if sleeved), and ovality/taper.
Can I use these for heavy towing? Yes. Performance cast construction is well-suited for OE+ rebuilds, work trucks, and tow rigs. For high cylinder pressure or competition builds, consider forged alternatives.
Do I need new connecting rods? Not necessarily. Many rebuilds reuse serviceable OE rods; however, always confirm pin size and bushing condition, and upgrade where power goals warrant.
