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Diamond 31640 Small Block Ford BOSS 351 Flat Top -3.5cc, 4.030" Bore, 3.500" Stroke, 5.780" Rod, 1.660" CD, .912" x 2.750" Pin

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Select Wrist Pins
Price: $1,285.49
Manufacturer: Diamond Racing Products
Part No.: 31640


Compression Ratios
60cc         
63cc         
76cc         
10.6:1
10.2:1
8.9:1

Part Number
31640
Bore
4.030"
Stroke
3.500"
Rod Length
5.780"
Comp. Height
1.660"
Wrist Pin
.912" x 2.750"
Piston Material
2618 Alloy
Piston Style
Flat Top
Volume -3.5cc
Ring Stack
1/16" x 1/16" x 3/16"

  Available Options
  • Moly Skirt Coating
  • Ceramic Dome Coating
  • 4130 Chrome Moly Wrist Pins 0.155" Wall
  • H-13 Tool Steel Wrist Pins 0.145" Wall
  • 9310 Endurance Alloy Wrist Pins 0.145" Wall
Recommended Piston Ring Set- 09024030

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