Racetec 1001755 AutoTec Dome Piston Set Features:

• Manufactured on 4032 material that will accept high performance applications
• CNC Precision used in every manufacturing operation
• Valve pockets machined for oversized valves and high lift cams
• Critically machined ring grooves for 1.5mm, 1.5mm, 3.0mm rings
• Top ring land gas distribution grooves to enhance performance and improve ring seal
• 990-2800-51-15C Heavy Duty Chromoly 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 for unrivaled tolerance control and finish

RaceTec 1001755 Autotec Dome Piston Set Specs:

• Engine Family: Big Block Chevy 348 / 409
• Displacement reference: 469 cu. in. (7.7L)
• Bore: 4.320 in.
• Stroke: 4 in.
• Rod Length: 6.135 in.
• Compression Height: 1.460 in.
• Crown Volume: 67 cc
• Piston Style: Dome
• Alloy: 4032
• Wrist Pin Diameter: 0.990 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

RaceTec 1001755 AutoTec Dome Piston Set Notes:

• Requires RaceTec AT4320 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 10.0:1 @ w/13 cc Heads
• Will work with most 348 / 409 cylinder heads