Racetec 1001632 AutoTec II Dish Piston Set Features:

• Manufactured on 2618 material forgings that will accept mild blown or nitrous applications
• CNC Precision used in every manufacturing operation
• Valve pockets machined for oversized valves and high lift cams
• Critically machined ring grooves for 1.5, 1.5, 3.0mm rings
• Top ring land gas distribution grooves to enhance performance and improve ring seal
• 990-2800-51-15C wrist pins, pin fit, wire locks, broached double pin oilers, and accumulator groove are included at no extra charge
• Diamond tooling used throughout production including ring grooves and skirts

RaceTec 1001632 Autotec II Dish Piston Set Specs:

• Engine Family: 23-Degree Small Block Chevy
• Displacement reference: 385 cu. in. (6.3L)
• Bore: 4.040 in.
• Stroke: 3.750 in.
• Rod Length: 6 in.
• Compression Height: 1.125 in.
• Crown Volume: -19.4 cc
• Piston Style: Dish
• Alloy: 2618
• Wrist Pin Diameter: 0.927 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

RaceTec 1001632 AutoTec II Dish Piston Set Notes:

• Requires RaceTec RT4040 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 9.5:1 @ w/64 cc Heads
  • 9.1:1 @ w/68 cc Heads
  • 8.9:1 @ w/70 cc Heads