JE Pistons ::::: JE Pistons 257977 Flat Top Set of 8 Pistons

JE Pistons 257977 JE Pistons; Flat Top; Set of 8 Pistons; Recommended RingSet: J100F8-4280-5

JE Pistons - Domestic: For over 60 years, JE Pistons has been the industry leader in forged racing pistons for Chevy, Ford, Mopar and Buick engines.

Features:

• Application Specific Forgings for an Optimized, Uniform Crown Thickness
• Contact Reduction Groove to Minimize Frictional Drag
• Accumulator Groove for Increased Top Ring Stability and Sealing
• CNC-Machined Side Relief with Lower Support Band for Additional Skirt Strength
• Honed Pin Bores, Double Pressure Fed Pin Oilers and Wire Locks Included

Specifications:

• CID: 489
• Block Height: 9.78
• Comp Ratio @ 118cc: 8.6:1
• Bore: 4.28
• Gram Weight: 595
• Oversize: 0.03
• Comp Ratio @ 110cc: 9.1:1
• Stroke: 4.25
• Dome Volume: -3
• Comp Height: 1.52
• Comp Ratio @ 124cc: 8.3:1
• Rod: 6.135

Fitments:

• Chevrolet 454 Big Block (1970-2000)
• Chevrolet 427 Big Block (1966-1969)
• Chevrolet 502 Big Block Base (1985-2010)