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You are here: Home > Pistons > Probe Forged Pistons > PRS - Professional Race Series > Chevrolet > Chevrolet - 400 Small Block > Flat Top



Flat top pistons for the Chevrolet 400

Flat top pistons in a Chevrolet 400 to 434 engine will generally provide compression ratios in the 12.5 to 12.5:1 range which makes them a good option for competition engines with aluminum heads and larger than stock camshafts. Valve reliefs are configured to work with most types of standard and 23 aluminum cylinder heads and will normally fit camshafts to well over .600 valve lift.




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Probe Forged Pistons
Probe Forged Pistons_PRS Series_Chevrolet 377_Flat_1.260 C/H_4.125 Base Bore_-4.0cc_.927 Pin_23d Wedge Head_Gas Ported

P/N: 8022-1-13954
  • V/R for 23d Wedge Head
  • 1.260 Compression Height
  • 3.480 Stroke
  • 6.000 Rod Length
  • .927 Wrist Pin
  • 52100 Bearing Steel Wrist Pins
  • .1.2 1.2 3.0 Ring Grooves
  • Top or Lateral Gas Ports
  • Nitrous - 400 H/P
  • Forced Induction - 20 lbs
Available Bore Sizes: 4.125, 4.145, 4.155, 4.165, 4.185
Price includes pistons, pins, locks and oil rail spacers (as required)
more info
Probe Forged Pistons
Probe Forged Pistons_PRS Series_Chevrolet 377_Flat_1.560 C/H_4.125 Base Bore_-4.0cc_.927 Pin_23d Wedge Head_Gas Ported

P/N: 8022-1-13955
  • V/R for 23d Wedge Head
  • 1.560 Compression Height
  • 3.480 Stroke
  • 5.700 Rod Length
  • .927 Wrist Pin
  • 52100 Bearing Steel Wrist Pins
  • .1.2 1.2 3.0 Ring Grooves
  • Top or Lateral Gas Ports
  • Nitrous - 400 H/P
  • Forced Induction - 20 lbs
Available Bore Sizes: 4.125, 4.145, 4.155, 4.165, 4.185
Price includes pistons, pins, locks and oil rail spacers (as required)
more info
Probe Forged Pistons
Probe Forged Pistons_PRS Series_Chevrolet 400_Flat_1.125 C/H_4.125 Base Bore_-4.0cc_.927 Pin_23d Wedge Head_Gas Ported

P/N: 8022-1-12339
  • V/R for 23d Wedge Head
  • 1.125 Compression Height
  • 3.750 Stroke
  • 6.000 Rod Length
  • .927 Wrist Pin
  • 52100 Bearing Steel Wrist Pins
  • .1.2 1.2 3.0 Ring Grooves
  • Top or Lateral Gas Ports
  • Nitrous - 400 H/P
  • Forced Induction - 20 lbs
Available Bore Sizes: 4.125, 4.145, 4.155, 4.165, 4.185
Price includes pistons, pins, locks and oil rail spacers (as required)
more info
Probe Forged Pistons
Probe Forged Pistons_PRS Series_Chevrolet 400_Flat_1.425 C/H_4.125 Base Bore_-4.0cc_.927 Pin_23d Wedge Head_Gas Ported

P/N: 8022-1-12338
  • V/R for 23d Wedge Head
  • 1.425 Compression Height
  • 3.750 Stroke
  • 5.700 Rod Length
  • .927 Wrist Pin
  • 52100 Bearing Steel Wrist Pins
  • .1.2 1.2 3.0 Ring Grooves
  • Top or Lateral Gas Ports
  • Nitrous - 400 H/P
  • Forced Induction - 20 lbs
Available Bore Sizes: 4.125, 4.145, 4.155, 4.165, 4.185
Price includes pistons, pins, locks and oil rail spacers (as required)
more info
Probe Forged Pistons
Probe Forged Pistons_PRS Series_Chevrolet 421_Flat_1.062 C/H_4.125 Base Bore_-4.0cc_.927 Pin_23d Wedge Head_Gas Ported

P/N: 8022-1-14775
  • V/R for 23d Wedge Head
  • 1.062 Compression Height
  • 3.875 Stroke
  • 6.000 Rod Length
  • .927 Wrist Pin
  • 52100 Bearing Steel Wrist Pins
  • .1.2 1.2 3.0 Ring Grooves
  • Top or Lateral Gas Ports
  • Nitrous - 400 H/P
  • Forced Induction - 20 lbs
Available Bore Sizes: 4.125, 4.145, 4.155, 4.165, 4.185
Price includes pistons, pins, locks and oil rail spacers (as required)
more info
Probe Forged Pistons
Probe Forged Pistons_PRS Series_Chevrolet 434_Flat_1.000 C/H_4.125 Base Bore_-4.0cc_.927 Pin_23d Wedge Head_Gas Ported

P/N: 8022-1-14680
  • V/R for 23d Wedge Head
  • 1.000 Compression Height
  • 4.000 Stroke
  • 6.000 Rod Length
  • .927 Wrist Pin
  • 52100 Bearing Steel Wrist Pins
  • .1.2 1.2 3.0 Ring Grooves
  • Top or Lateral Gas Ports
  • Nitrous - 400 H/P
  • Forced Induction - 20 lbs
Available Bore Sizes: 4.125, 4.145, 4.155, 4.165, 4.185
Price includes pistons, pins, locks and oil rail spacers (as required)
more info