Description
This is MAHLE Motorsport's cast performance piston set for the 6.4L Powerstroke. It's based on the MaxxForce design, keeps the OE steel top ring insert, and uses a heavy-duty version of the factory bowl modified for lower compression.
Fits: Ford 6.4L Powerstroke (2008-2010).
Specs
- Bore: 3.866 in (standard)
- Compression Height: 2.049 in (0.010 in shorter than stock)
- Stroke / Rod: 4.134 in / 6.929 in
- Pin Diameter: 1.516 in (38.5 mm), floating, steel
- Crown Volume: -39.7cc dish, no valve reliefs
- Compression Ratio: 16.2:1 (MAHLE calculation)
- Piston Weight: 761 g each
- Material: Cast M142 aluminum
- Coatings: GRAFAL coated skirt
- Ring Set: 2.5 mm keystone steel top / 2.0 mm cast iron second / 2.5 mm oil
- Piston-to-Wall Clearance: 0.0021-0.0029 in
What's included: 8 pistons, DLC-coated wrist pins, snap ring locks and ring set (S42246).
Oversize versions are 197887076, 197887086 and 197887096 (3.876 to 3.896 in). The CR figure assumes 0.008 in protrusion above deck and a 0.059 in head gasket. Have your machine shop confirm bore size and clearances before ordering. Questions? Call Ducky at 479-799-3953.
