Product Description
Race-ready durability for your 6.6L Duramax. INDUSTRIAL INJECTION PDM-298STD race cast pistons are designed for high-heat, high-load builds and professional-quality rebuilds. Each piston is de-lipped for strength and features cut & coated crowns plus skirt coatings to help manage heat and reduce friction. Standard bore size for blocks staying at OE diameter (verify wall finish and clearance).
Fitment
- 2001–2004 LB7 6.6L Duramax
- 2004.5–2005 LLY 6.6L Duramax
- 2006–2007.5 LBZ 6.6L Duramax
- 2007.5–2010 LMM 6.6L Duramax
- 2011–2016 LML 6.6L Duramax
What’s Included
- (8) Race cast pistons — STD (standard) bore
- Rings, wrist pins, and locks
- Cut & coated tops, coated skirts; de-lipped bowl design
Why These Pistons
- De-lipped bowl increases strength in the hottest area of the piston
- Thermal crown coating helps keep heat in the chamber for efficiency
- Low-friction skirt coating reduces scuffing under extreme load
- Standard bore option for blocks that measure within spec after hone
Recommended Parts (CPP Internal Links)
- ARP 230-4201 Head Stud Kit (01–16 Duramax)
- MAHLE HS54580C Upper Head Set (11–16 LML) (use correct gaskets for your year/engine)
- Shop All Duramax Pistons & Rings
- Explore All GM Duramax Categories
Helpful Notes
- Machine work: Even with STD bore pistons, a precision hone and exact measurements are required. Verify piston-to-wall clearance and ring end gaps.
- Compression/clearance: Match gasket thickness and cam profile; check piston-to-valve and piston-to-head clearances.
- Usage: Intended for high-performance/competition builds; confirm suitability for your power goals.
FAQ
Do I need to overbore for these pistons?No—PDM-298STD is a standard bore set. Your block must measure within spec after honing. If cylinders are out of round or tapered beyond spec, consider an oversize piston set.
What’s the benefit of de-lipped bowls?Removing the lip reduces a common stress riser in the bowl area, improving durability under high heat and cylinder pressure.
What coatings are applied?Thermal crown coating helps manage combustion heat, while skirt coating reduces friction and scuffing during heavy load and high RPM operation.
Which supporting parts are a must?Use quality head studs, the correct head gaskets for your engine code, and ensure adequate fuel and air supply consistent with your target power level.
