Racetec 1000603 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
• 927-2250-51-15C wrist pins or 945-2250-51-15C as indicated, pin fitting, wire locks, broached pin oilers, and accumulator groove are included at no extra charge
• Diamond turned skirts
• Forging designed to clear reluctor wheel in all stroker applications

RaceTec 1000603 Autotec Flat Top Piston Set Specs:

• Engine Family: 15-Degree GM Gen III/IV LS
• Displacement reference: 403 cu. in. (6.6L)
• Bore: 4.005 in.
• Stroke: 4 in.
• Rod Length: 6.125 in.
• Compression Height: 1.115 in.
• Crown Volume: -3.3 cc
• Piston Style: Flat Top w/2 Valve Reliefs
• Alloy: 4032
• Wrist Pin Diameter: 0.927 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

RaceTec 1000603 AutoTec Flat Top Piston Set Notes:

• Requires RaceTec AT 4005 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 12 @ w/60 cc Heads
  • 11.5 @ w/64 cc Heads
  • 10.6 @ w/71 cc Heads
• Includes oil rail supports