Description
This is MAHLE Motorsport's cast performance piston set for the 2001-2016 6.6L Duramax. MAHLE uses a revised casting with improved crown geometry and a performance bowl.
Fits: GM 6.6L Duramax LB7, LLY, LBZ, LMM, LGH and LML (2001-2016). Not for the L5P.
Specs
- Bore: 4.055 in (standard)
- Compression Height: 1.951 in (0.010 in shorter than stock)
- Stroke / Rod: 3.898 in / 6.417 in
- Pin Diameter: 1.358 in, floating, steel
- Crown Volume: -40.7cc dish, no valve reliefs
- Compression Ratio: 16.6:1 (MAHLE calculation)
- Piston Weight: 864 g each
- Material: Cast M142 aluminum
- Coatings: GRAFAL coated skirt
- Ring Grooves: 3.0 mm keystone / 2.0 mm / 3.0 mm
- Piston-to-Wall Clearance: 0.0016-0.0023 in
What's included: 8 pistons, wrist pins, snap ring locks and ring set (40xxMDK-D).
Oversize versions are 930036075 (4.075 in) and 930036095 (4.095 in). The CR figure assumes 0.012 in protrusion above deck and a 0.037 in head gasket. Have your machine shop confirm bore size and clearances before ordering. Questions? Call Ducky at 479-799-3953.
