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You are here: Home > Pistons > Autotec Forged Pistons > Chevrolet > Chevrolet - Big Block > Dome Top > Small Open Chamber Dome

Autotec dome top pistons are manufactured on forged side relief, 4032 low expansion, high silicon material excellent for street or strip applications, fitting most 23į heads. They feature:
  • CNC precision machined ring grooves for 1.5 1.5 3.0mm low friction rings.
  • Top ring land gas distribution grooves serve to enhance performance and improve ring seal.
  • .990 diameter, 2.800 long, 51 series steel wrist pins with pin fit, wire locks, broached pin oilers, and gas accumulator grooves included at no extra charge.
  • Diamond turned skirts.


Small Open Chamber Dome
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Autotec Forged Pistons
Autotec_Chevrolet 454_Small Dome_1.270 C/H_4.250 Stroke_6.385 Rod_4.280 through 4.350 Bore_21.2cc_.990 Pin_Standard Head

P/N: ATK-1000307_Base
  • V/R for Standard BB Chevrolet Head
  • 1.270 Compression Height
  • 4.250 Stroke
  • 6.385 Rod Length
  • .990 Wrist Pin Diameter
  • 1.5 1.5 3.0 Rings
  • Nitrous - 150 H/P
  • Forced Induction - 10 lbs
Available Bore Sizes: 4.280, 4.310, 4.320, 4.350
Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec_Chevrolet 454_Small Dome_1.395 C/H_4.000 Stroke_6.385 Rod_4.280 through 4.350 Bore_27.5cc_.990 Pin_Standard Head

P/N: ATK-1000295_Base
  • V/R for Standard BB Chevrolet Head
  • 1.395 Compression Height
  • 4.000 Stroke
  • 6.385 Rod Length
  • .990 Wrist Pin Diameter
  • 1.5 1.5 3.0 Rings
  • Nitrous - 150 H/P
  • Forced Induction - 10 lbs
Available Bore Sizes: 4.280, 4.310, 4.320, 4.350
Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec_Chevrolet 454_Small Dome_1.520 C/H_4.250 Stroke_6.135 Rod_4.280 through 4.350 Bore_21.2cc_.990 Pin_Standard Head

P/N: ATK-1000301_Base
  • V/R for Standard BB Chevrolet Head
  • 1.520 Compression Height
  • 4.250 Stroke
  • 6.135 Rod Length
  • .990 Wrist Pin Diameter
  • 1.5 1.5 3.0 Rings
  • Nitrous - 150 H/P
  • Forced Induction - 10 lbs
Available Bore Sizes: 4.280, 4.310, 4.320, 4.350
Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec_Chevrolet 454_Small Dome_1.645 C/H_4.000 Stroke_6.135 Rod_4.280 through 4.350 Bore_-27.5cc_.990 Pin_Standard Head

P/N: ATK-1000288_Base
  • V/R for Standard BB Chevrolet Head
  • 1.645 Compression Height
  • 4.000 Stroke
  • 6.135 Rod Length
  • .990 Wrist Pin Diameter
  • 1.5 1.5 3.0 Rings
  • Nitrous - 150 H/P
  • Forced Induction - 10 lbs
Available Bore Sizes: 4.280, 4.310, 4.320, 4.350
Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec_Chevrolet 502_Small Dome_1.270 C/H_4.250 Stroke_6.385 Rod_4.500 through 4.630 Bore_19.2cc_.990 Pin_Standard Head

P/N: ATK-1000311_Base
  • V/R for Standard BB Chevrolet Head
  • 1.270 Compression Height
  • 4.250 Stroke
  • 6.385 Rod Length
  • .990 Wrist Pin Diameter
  • 1.5 1.5 3.0 Rings
  • Nitrous - 150 H/P
  • Forced Induction - 10 lbs
Available Bore Sizes: 4.500, 4.530, 4.560, 4.600, 4.630
Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec_Chevrolet 502_Small Dome_1.395 C/H_4.000 Stroke_6.385 Rod_4.500 through 4.530 Bore_19.4cc_.990 Pin_Standard Head

P/N: ATK-1000299_Base
  • V/R for Standard BB Chevrolet Head
  • 1.395 Compression Height
  • 4.000 Stroke
  • 6.385 Rod Length
  • .990 Wrist Pin Diameter
  • 1.5 1.5 3.0 Rings
  • Nitrous - 150 H/P
  • Forced Induction - 10 lbs
Available Bore Sizes: 4.500, 4.530
Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec_Chevrolet 502_Small Dome_1.520 C/H_4.250 Stroke_6.135 Rod_4.500 through 4.530 Bore_12.6cc_.990 Pin_Standard Head

P/N: ATK-1000305_Base
  • V/R for Standard BB Chevrolet Head
  • 1.520 Compression Height
  • 4.250 Stroke
  • 6.135 Rod Length
  • .990 Wrist Pin Diameter
  • 1.5 1.5 3.0 Rings
  • Nitrous - 150 H/P
  • Forced Induction - 10 lbs
Available Bore Sizes: 4.500, 4.530
Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec_Chevrolet 502_Small Dome_1.645 C/H_4.000 Stroke_6.135 Rod_4.470 through 4.530 Bore_19.4cc_.990 Pin_Standard Head

P/N: ATK-1000292_Base
  • V/R for Standard BB Chevrolet Head
  • 1.645 Compression Height
  • 4.000 Stroke
  • 6.135 Rod Length
  • .990 Wrist Pin Diameter
  • 1.5 1.5 3.0 Rings
  • Nitrous - 150 H/P
  • Forced Induction - 10 lbs
Available Bore Sizes: 4.470, 4.500, 4.530
Price includes pistons, pins, locks and oil rail spacers (as required).
more info