JE Pistons ::::: JE Pistons 280265 Flat Top

JE Pistons 280265 JE Pistons; Flat Top; For 12 Raptor, 12 Pro-Filer, Dart Big Chief 14, Sonny Tru-Pro 14.5 & Brodix PB1200 Heads; For N/A Motors; Oil Rail Support is Included; Set of 8 Pistons; Recommended RingSet: J77008-4610-5

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:

• Bore: 4.61
• Comp Height: 1.12
• Comp Ratio @ 77cc: 14.5:1
• Comp Ratio @ 65cc: 16.5:1
• Comp Ratio @ 70cc: 15.6:1
• Oversize: 0.01
• Rod: 6.7
• Gram Weight: 578
• CID: 634
• Stroke: 4.75
• Block Height: 10.195
• Dome Volume: -7.3

Fitments:

• Chevrolet 632 Big Block (1970-2010)