The Mahle PowerPak pistons are a race proven lightweight forged design that are complete with rings, wrist pins and locks. They are also completely phosphate coated plus feature an anti-friction Grafal skirt coating. PowerPak pistons are made from 4032 aluminum alloy to allow for tighter cylinder to wall clearances, and improved temperature stability.
1.5mm, 1.5mm, 3.0mm file fit performance ring set is included. For 383 c.i. S/B Chevy (4.000" bore x 3.75" stroke). Choose oversize diameter needed.
- Mahles phosphate coating provides the grey appearance to the piston. This dry lubricant coating (not to be confused with a thermal film coating) provides a lubricant film in the pin bores and ring grooves until the oiling system of the engine reaches operating pressure; particularly useful during the initial start-up or break-in of engines to protect against galling and microwelding. The piston crown is still machineable.
- Mahle’s GRAFAL skirt coating reduces drag, scuffing, friction and cylinder bore wear; reduces piston noise.
PowerPak Piston Chart (GIF)
Item DetailsC/R 58cc=12.0, 64cc=11.3, 70cc=10.4
Piston Weight: 451 g
Rod Length: 5.7"
- Comp Height 5.7" Rod: 1.425
- Comp Height 6.0" Rod: 1.125
- Pin Diameter: 0.927
- Clearance Guide
- *Meas. = 0.500
- Min = 0.0025
- Max = 0.0033
*The location to measure piston-to-wall clearance for each application. This point is calculated from the bottom of the piston skirt and indicates the widest part of the piston and thus where to measure.
|Piston Style||Flat Top w/ 2 valve reliefs|
|Piston Material||Forged Aluminum|
|Piston Diameter||Select Oversize to see|
|Connecting Rod Length||5.700"|
|Piston Weight||451 grams|
|Piston Ring Style||E|
|Wrist Pin Diameter||0.9270"|
|Top Ring Material||Ductile Iron|
|Second Ring Material||Cast Iron|
|Top Ring Thickness||1.5 mm|
|Second Ring Thickness||1.5 mm|
|Oil Ring Thickness||3.0 mm|
|Oil Ring Tension||Standard Tension|
|Sold in Quantity||Set|