Racetec 1001321 RaceTec Flat Top 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 1.5mm, 1.5mm, 3.0mm rings
• Top ring land gas distribution grooves to enhance performance and improve ring seal
• 912-2700-51-15C or 927-2700-51-15C 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 1001321 Racetec Flat Top Piston Set Specs:

• Engine Family: 20-Degree Small Block Ford 351
• Displacement reference: 409 cu. in. (6.7L)
• Bore: 4.035 in.
• Stroke: 4 in.
• Rod Length: 6.300 in.
• Compression Height: 1.200 in.
• Crown Volume: -5.2 cc
• Piston Style: Flat Top w/2 Valve Reliefs
• Alloy: 2618
• Wrist Pin Diameter: 0.927 in.
• Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

RaceTec 1001321 RaceTec Flat Top Piston Set Notes:

• Requires RaceTec AT 4035 Ring Set or Equivalent (Sold Separately)
• Compression Ratios:
  • 12.9 @ w/56 cc Heads
  • 12.3 @ w/60 cc Heads
  • 11.7 @ w/64 cc Heads
• Will not fit Twisted Wedge heads