Racetec 1000683 Autotec Large Dome Piston Set Features:

• Manufactured from low-expansion, high-silicon, 4032 material with side reliefs that's excellent for street or strip applications
• CNC Precision machined ring grooves for 1.5 mm, 1.5 mm, 3.0 mm rings
• Top ring land gas distribution groove to enhance performance and improve ring seal
• 990-2800-51-15C wrist pins, pin fitting, wire locks, broached pin oilers, and accumulator groove are included at no extra charge
• Diamond turned skirts

Racetec 1000683 Autotec Large Dome Piston Set Specs:

• Engine Family: Big Block Chevy
• Displacement reference: 565 cu. in. (9.3L)
• Bore: 4.600 in.
• Stroke: 4.250 in.
• Rod Length: 6.385 in.
• Compression Height: 1.270 in.
• Crown Volume: 28.7 cc
• Piston Style: Large Dome
• Alloy: 4032
• Wrist Pin Diameter: 0.990 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

Racetec 1000683 Autotec Large Dome Piston Set Notes:

• Requires RaceTec AT 4600 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 13.3 @ w/112 cc Heads
  • 12.5 @ w/118 cc Heads
  • 11.9 @ w/124 cc Heads
• Includes oil rail supports
• Will not fit Edelbrock Performer, Performer RPM or GM Series cylinder heads