Available on both hypereutectic and POWERFORGED pistons, DUROSHIELD is an exclusive moly-graphite skirt
coating that extends engine life and essentially eliminates scuffing. This technologically advanced coating is precisely applied to the piston through a computer-controlled process.

DUROSHIELD skirt coated pistons:

• Reduce friction for increased fuel economy and horsepower
• Essentially eliminate scuffing and wear
• Prevent damage from inadequate lubrication, especially at start-up
• Improve cylinder sealing for less blow-by and more power
• Require no increase in skirt clearance

Piston Specifications :

• CID: 389
• Bore: 4.060
• Stroke: 3.750
• Rod Length: 5.700
• Compression Height: 1.425
• Compression Ratio with 64cc chamber volume: 10.53
• Compression Ratio with 72cc chamber volume: 9.69
• Compression Ratio with 76cc chamber volume: 9.33
• Dome Volume: -12.0cc
• Pin Type: Press or float
• Recommended Ring Set: Moly - SPE251K 060, STD Fit - SPR9903 060, File Fit - SPR9343 065
• Coated skirt