Racetec 1000509 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 wrist pins or 927-2700-51-15C, pin fit, wire locks, broached pin oilers and accumulator grooves are included at no extra charge
• Diamond turned skirts

RaceTec 1000509 Autotec Dome Piston Set Specs:

• Engine Family: Small Block Ford 351W
• Displacement reference: 355 cu. in. (5.8L)
• Bore: 4.020 in.
• Stroke: 3.500 in.
• Rod Length: 5.956 in.
• Compression Height: 1.770 in.
• Crown Volume: 6 cc
• Piston Style: Dome
• Alloy: 4032
• Wrist Pin Diameter: 0.912 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

RaceTec 1000509 AutoTec Dome Piston Set Notes:

• Requires RaceTec AT 4025 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 13.7 @ w/54 cc Heads
  • 12.5 @ w/60 cc Heads
  • 11.2 @ w/68 cc Heads