JE Heavy Duty Flat-Top Pistons are forged for high-performance Ford 351W stroker engine combinations where strength, dimensional stability, and precise compression control are critical. This set combines a 4.030 in. bore with a 1.250 in. compression height and -5cc flat-top design with valve reliefs. The pistons support popular 408 and 418 cubic-inch combinations using the appropriate 4.000 or 4.100 in. stroke and connecting rod length, making them well suited for serious street, naturally aspirated, and competition engine builds.

JE Pistons 188704 Features:

• Forged aluminum construction
• Flat-top design with two valve reliefs
• 4.030 in. bore
• 1.250 in. compression height
• -5cc head volume
• 0.927 in. wrist pin diameter
• 438-gram nominal piston weight
• 1/16 in., 1/16 in., and 3/16 in. piston ring grooves
• Set of 8 pistons

JE Pistons 188704 Notes:

• For Ford 351W stroker engine applications
• 408 cu. in. combination uses a 4.000 in. stroke with 6.250 in. connecting rods
• 418 cu. in. combination uses a 4.100 in. stroke with 6.200 in. connecting rods
• 408 cu. in. compression ratios: 12.9:1 with 56cc heads, 12.3:1 with 60cc heads, and 11.7:1 with 64cc heads
• 418 cu. in. compression ratios: 13.2:1 with 56cc heads, 12.6:1 with 60cc heads, and 12.0:1 with 64cc heads