Racetec 1000797 AutoTec Dome 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 1.5, 1.5, 3.0 rings unless otherwise indicated
• Top ring land gas distribution groove to enhance performance and improve ring seal
• 1.031-2800-51-15C wrist pins, pin fitting, wire locks, broached pin oilers and accumulator grooves are included
• Diamond turned skirts

RaceTec 1000797 Autotec Dome Piston Set Specs:

• Engine Family: Chrysler 426 Hemi
• Displacement reference: 477 cu. in. (7.8L)
• Bore: 4.280 in.
• Stroke: 4.150 in.
• Rod Length: 6.860 in.
• Compression Height: 1.795 in.
• Crown Volume: 76 cc
• Piston Style: Dome
• Alloy: 4032
• Wrist Pin Diameter: 1.031 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

RaceTec 1000797 AutoTec Dome Piston Set Notes:

• Requires RaceTec AT 4280 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 10.4 @ w/168 cc Heads
  • 9.9 @ w/174 cc Heads
• Rod clearance milled to 1.300 in.