Racetec 1000539 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 1/16 in., 1/16 in., 3/16 in. rings
• Top ring land gas distribution groove to enhance performance and improve ring seal
• 1.040-2800-51-15C wrist pin or 990-2800-51-15C wrist pin, pin fit, wire locks, broached pin oilers and accumulator grooves are included at no extra charge
• Diamond turned skirts

RaceTec 1000539 Autotec Flat Top Piston Set Specs:

• Engine Family: Big Block Ford 429
• Displacement reference: 435 cu. in. (7.1L)
• Bore: 4.400 in.
• Stroke: 3.590 in.
• Rod Length: 6.605 in.
• Compression Height: 1.890 in.
• Crown Volume: -3 cc
• Piston Style: Flat Top w/2 Valve Reliefs
• Alloy: 4032
• Wrist Pin Diameter: 0.912 in.
• Ring Grooves: 1/16 in. Top, 1/16 in. Second, 3/16 in. Oil

RaceTec 1000539 AutoTec Flat Top Piston Set Notes:

• Compression Ratios:
  • 11.4 @ w/72 cc Heads
  • 10.9 @ w/76 cc Heads
  • 9.5 @ w/92 cc Heads