Racetec 1000783 AutoTec Flat Top 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
• 975-2700-51-15C wrist pin or 990-2500-51-15C wrist pin, pin fit, wire locks, broached pin oilers and accumulator grooves are included at no extra
• charge
• Diamond turned skirts

RaceTec 1000783 Autotec Flat Top Piston Set Specs:

• Engine Family: Ford FE
• Displacement reference: 429 cu. in. (7.0L)
• Bore: 4.250 in.
• Stroke: 3.780 in.
• Rod Length: 6.490 in.
• Compression Height: 1.770 in.
• Crown Volume: -5 cc
• Piston Style: Flat Top w/2 Valve Reliefs
• Alloy: 4032
• Wrist Pin Diameter: 0.990 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

RaceTec 1000783 AutoTec Flat Top Piston Set Notes:

• Requires RaceTec AT 4255 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 11 @ w/71 cc Heads
  • 10.5 @ w/78 cc Heads
  • 9.5 @ w/88 cc Heads