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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 Bore_41.0cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000685
  • V/R for 23 Heads
  • 4.280 Bore
  • 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

Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec Forged Pistons_Chevrolet 454_Large Dome_1.120 C/H_4.250 Stroke_6.535 Rod_4.310 Bore_39.8cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000686
  • V/R for 23 Heads
  • 4.310 Bore
  • 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

Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec Forged Pistons_Chevrolet 454_Large Dome_1.120 C/H_4.250 Stroke_6.535 Rod_4.320 Bore_39.4cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000687
  • V/R for 23 Heads
  • 4.320 Bore
  • 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

Price includes pistons, pins, locks and oil rail spacers (as required).
more info
Autotec Forged Pistons
Autotec Forged Pistons_Chevrolet 454_Large Dome_1.120 C/H_4.250 Stroke_6.535 Rod_4.350 Bore_38.1cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000688
  • V/R for 23 Heads
  • 4.350 Bore
  • 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

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 Bore_45.0cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000546
  • V/R for 23 Heads
  • 4.280 Bore
  • 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

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_4.310 Bore_45.0cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000547
  • V/R for 23 Heads
  • 4.310 Bore
  • 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

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_4.320 Bore_44.6cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000657
  • V/R for 23 Heads
  • 4.320 Bore
  • 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

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_4.350 Bore_43.4cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000658
  • V/R for 23 Heads
  • 4.350 Bore
  • 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

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_4.310 Bore_39.8cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000676
  • V/R for 23 Heads
  • 4.310 Bore
  • 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

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_4.320 Bore_39.4cc_.990 Pin_Open Chamber Head
Price $821.00

P/N: ATK-1000677
  • V/R for 23 Heads
  • 4.320 Bore
  • 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

Price includes pistons, pins, locks and oil rail spacers (as required).
more info