JE Pistons ::::: JE Pistons 258242 Dome Open Chamber Set of 8 Pistons

JE Pistons 258242 JE Pistons; Dome; Open Chamber; Oil Rail Support is Included; Set of 8 Pistons; Recommended RingSet: J10008-4280-5

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:

• Block Height: 9.78
• Comp Ratio @ 124cc: 12.1:1
• Dome Volume: 43
• Comp Ratio @ 110cc: 14.1:1
• Gram Weight: 571
• Comp Height: 1.27
• Oversize: 0.03
• Rod: 6.385
• Bore: 4.28
• CID: 489
• Comp Ratio @ 118cc: 12.9:1
• Stroke: 4.25

Fitments:

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