Diamond 31711 Small Block Ford Twisted Wedge / Race - Flat Top Pistons -6.9cc , 4.030" Bore, 3.400" Stroke, 5.400" Rod, 1.090" CD, .927" x 2.750" Pin

* Valve Pocket Depth for 1.090" CD Pistons are .289" Intake and .260" Exhaust
Compression Ratios

58cc	62cc	66cc
10.4:1	10.0:1	9.6:1

*Includes Oil Rail Supports

Part Number	31711
Bore	4.030"
Stroke	3.400"
Rod Length	5.400"
Comp. Height	1.090"*
Wrist Pin	.927" x 2.750"
Top Ring Down	.265"
Piston Material	2618 Alloy
Piston Style	Flat Top
Volume	-6.9cc
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
• 4130 Chrome Moly Coated Wrist Pins 0.155" Wall
  
• H-13 Tool Steel Wrist Pins 0.145" Wall
  
• H-13 Tool Steel Wrist Pins 0.155" Wall
• H-13 Tool Steel Wrist Pins 0.165" Wall
• H-13 Tool Steel Coated Wrist Pins 0.145" Wall 
• H-13 Tool Steel Coated Wrist Pins 0.155" Wall
• H-13 Tool Steel Coated Wrist Pins 0.165" Wall
• 9310 Endurance Alloy Wrist Pins 0.145" Wall
• 9310 Endurance Alloy Wrist Pins 0.155" Wall
• 9310 Endurance Alloy Wrist Pins 0.165" Wall
  

Recommended Piston Ring Set- 09024030