The POWERPAK kit is the racer’s best value. Developed for highperformance enthusiasts and engine builders who want uncompromising reliability, the POWERPAK delivers just that. The forged piston kits are made from either 4032 aluminum alloy, which allows for tighter cylinder-to-wall clearances and improved temperature stability, or 2618 alloy, which adds strength and increased detonation resistance. In addition to fully machined crowns and CNC machined pin bores, the pistons are dual coated with phosphate to reduce micro-welding and pin galling, and the skirt features a GRAFAL® anti-friction coating. Each set includes low-drag rings proven to increase horsepower and torque, clips and application-specific pins—all designed to ensure minimum friction and maximum horsepower.

Forged piston for performance applications
Fully-machined crown
Grafal anti-Friction coating on skirts*
Phosphate-coated to reduce micro-welding and pin galling**
Pin bores finished on CNC boring equipment
Hand deburred
High strength, light weight German steel pins
Race-proven round wire locks
Low drag ring pack
Light weight slipper skirt forgings

* MAHLE’s GRAFAL® skirt coating reduces drag, scuffing, friction and cylinder bore wear; reduces piston noise.

** Phosphate coating provides the grey appearance to the MAHLE 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.

Guides & Documents

Pistons Installation Instructions (5039737)

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

Specifications

KEY SPECS
MFG. Part #	Select Oversize to see
Brand	MAHLE
Piston Style	Dome
Piston Material	Forged Aluminum
Wrist Pin Included	Yes
Wrist Pin Style	Floating

GENERAL
Stroke	4.00"
Connecting Rod Length	6.135"
Piston Ring Diameter	.990"
Piston Rings Included	Yes
Second Ring Material	Cast Iron
Second Ring Facing Material	Phosphate coated
Top Ring Thickness	1.5 mm
Top Ring Facing Material	Plasma-Moly
Top Ring Material	Ductile Iron
Second Ring Thickness	1.5 mm
Oil Ring Thickness	3.0 mm
Oil Ring Tension	Standard Tension
Oil Ring Material	Stainless Steel
Sold in Quantity	Set
Bore Size	Select Oversize to see
Compression Height	1.645"
File Fit	Yes
Gapless	No
Piston Head Volume	-28.00CC
Wrist Pin Retainers Included	Yes

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Questions & Answers

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Wondering what these pistons would have for compression with 110cc closed chambered head + head gasket @ .380 or close to that m measurement. Looking for some 454 .060 over pistons trying to get 10-10.7 compression. I have other heads also. Open chamber 119cc

by Jay Smeal

• 8 months ago

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