Racetec 1000426 AutoTec 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 1.5mm, 1.5mm, 3.0mm Rings
• Top ring land gas distribution groove to enhance performance and improve ring seal
• 912-2700-51-15C or 927-2700-51-15C wrist pins, pin fit, wire locks, broached pin oilers and accumulator grooves are included at no extra charge
• Diamond turned skirts

RaceTec 1000426 Autotec Dome Piston Set Specs:

• Engine Family: 20-Degree Small Block Ford 302
• Displacement reference: 349 cu. in. (5.7L)
• Bore: 4.040 in.
• Stroke: 3.400 in.
• Rod Length: 5.400 in.
• Compression Height: 1.100 in.
• Crown Volume: 9.4 cc
• Piston Style: Dome
• Alloy: 4032
• Wrist Pin Diameter: 0.927 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

RaceTec 1000426 AutoTec Dome Piston Set Notes:

• Requires RaceTec AT 4040 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 14.4 @ w/54 cc Heads
  • 13 @ w/60 cc Heads
  • 12.2 @ w/64 cc Heads
• Includes oil rail supports