Description
This is MAHLE Motorsport's forged aluminum race piston set for the 5.9L 24-valve Cummins. MAHLE recommends forged pistons mainly for dedicated drag and pulling trucks.
Fits: 5.9L 24-valve Cummins (common rail). MAHLE bases the bowl on a modified version of the 2004.5-2007 design.
Specs
- Bore: 4.015 in (standard)
- Compression Height: 2.805 in (0.010 in shorter than stock)
- Stroke / Rod: 4.724 in / 7.559 in
- Pin Diameter: 1.575 in, floating, steel
- Crown Volume: -46.7cc dish with 0.100 in deep valve pockets
- Compression Ratio: 16.3:1 (MAHLE calculation)
- Piston Weight: 1,203 g each
- Material: Forged M142P aluminum
- Coatings: GRAFAL coated skirt, hard anodized top ring groove
- Piston-to-Wall Clearance: 0.0076-0.0084 in
What's included: 6 pistons, wrist pins, snap ring locks and ring set (9300440xx-6).
Oversize versions are 197946335 (4.035 in) and 197946355 (4.055 in). The CR figure assumes 0.010 in protrusion above deck and a 0.060 in head gasket. Have your machine shop confirm bore size and clearances before ordering. Questions? Call Ducky at 479-799-3953.
