JE Pistons ::::: JE Pistons 258241 Dome Open Chamber Set of 8 Pistons

JE Pistons 258241 JE Pistons; Dome; Open Chamber; Oil Rail Support is Included; Nitrous Dome Series and include .180" wall pins; Set of 8 Pistons; Recommended RingSet: J100U8-4600-5

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:

• Comp Height: 1.27
• Stroke: 4.25
• Gram Weight: 686
• CID: 565
• Oversize: 0.134
• Block Height: 9.78
• Dome Volume: 45
• Comp Ratio @ 110cc: 16.2:1
• Rod: 6.385
• Bore: 4.6
• Comp Ratio @ 110cc: 16.3:1
• Comp Ratio @ 118cc: 14.8:1
• Comp Ratio @ 124cc: 13.9:1

Fitments:

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