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You are here: Home > Pistons > Autotec Forged Pistons > Chevrolet > Chevrolet - Big Block > Dome Top > Large 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 23° 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.


Large Open Chamber Dome


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Autotec Forged Pistons
Autotec Forged Pistons_Chevrolet 454_Large Dome_1.120 C/H_4.250 Stroke_6.535 Rod_4.280 through 4.350 Bore_39.8cc_.990 Pin_Standard Head

P/N: ATK-1000685_Base
  • V/R for Standard BB Chevrolet Head
  • 1.120 Compression Height
  • 4.250 Stroke
  • 6.535 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 Forged Pistons_Chevrolet 454_Large Dome_1.245 C/H_4.000 Stroke_6.535 Rod_4.280 through 4.350 Bore_45.0cc_.990 Pin_Standard Head

P/N: ATK-1000546_Base
  • V/R for Standard BB Chevrolet Head
  • 1.245 Compression Height
  • 4.000 Stroke
  • 6.535 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 Forged Pistons_Chevrolet 454_Large Dome_1.270 C/H_4.250 Stroke_6.385 Rod_4.280 through 4.350 Bore_39.8cc_.990 Pin_Standard Head

P/N: ATK-1000675_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 Forged Pistons_Chevrolet 454_Large Dome_1.395 C/H_4.000 Stroke_6.385 Rod_4.280 through 4.350 Bore_45.0cc_.990 Pin_Standard Head

P/N: ATK-1000324_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 Forged Pistons_Chevrolet 454_Large Dome_1.520 C/H_4.250 Stroke_6.135 Rod_4.280 through 4.350 Bore_39.8cc_.990 Pin_Standard Head

P/N: ATK-1000665_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 Forged Pistons_Chevrolet 454_Large Dome_1.645 C/H_4.000 Stroke_6.135 Rod_4.280 through 4.350 Bore_45.0cc_.990 Pin_Standard Head

P/N: ATK-1000316_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 Forged Pistons_Chevrolet 502_Large Dome_1.120 C/H_4.250 Stroke_6.535 Rod_4.500 through 4.600 Bore_32.7cc_.990 Pin_Standard Head

P/N: ATK-1000690_Base
  • V/R for Standard BB Chevrolet Head
  • 1.120 Compression Height
  • 4.250 Stroke
  • 6.535 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, 4.600
Price includes pistons, pins, locks and oil rail spacers (as required). more info
Autotec Forged Pistons
Autotec Forged Pistons_Chevrolet 502_Large Dome_1.245 C/H_4.000 Stroke_6.535 Rod_4.500 through 4.600 Bore_38.4cc_.990 Pin_Standard Head

P/N: ATK-1000660_Base
  • V/R for Standard BB Chevrolet Head
  • 1.245 Compression Height
  • 4.000 Stroke
  • 6.535 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, 4.600
Price includes pistons, pins, locks and oil rail spacers (as required). more info
Autotec Forged Pistons
Autotec Forged Pistons_Chevrolet 502_Large Dome_1.270 C/H_4.250 Stroke_6.385 Rod_4.500 through 4.630 Bore_32.7cc_.990 Pin_Standard Head

P/N: ATK-1000680_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, 4.600, 4.630
Price includes pistons, pins, locks and oil rail spacers (as required). more info
Autotec Forged Pistons
Autotec Forged Pistons_Chevrolet 502_Large Dome_1.395 C/H_4.000 Stroke_6.385 Rod_4.500 through 4.600 Bore_38.4cc_.990 Pin_Standard Head

P/N: ATK-1000329_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, 4.600
Price includes pistons, pins, locks and oil rail spacers (as required). more info