Flat Top

Custom Piston Worksheet & Order Form (pdf)

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Autotec flat top pistons are manufactured on forged side relief, 4032 low expansion, high silicon material excellent for street or strip applications for either the 12° and 15° heads. They feature:

CNC precision machined ring grooves for 1.5 1.5 3.0mm rings.
Top ring land gas distribution grooves serve to enhance performance and improve ring seal.
.927 diameter, 2.250 long, 5.1 series steel wrist pins pin fit, wire locks, broached pin oilers, and gas accumulator grooves are included at no extra charge.
Diamond turned skirts.
Forging specifically designed to clear the reluctor wheel in all stroker applications.

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Autotec Forged Pistons_Chevrolet LS_Flat_1.040 C/H_3.905 Bore_-3.3cc_.927 Pin_15° Head

P/N: ATK-1000602_Base

V/R for 15° Heads
1.040 Compression Height
4.000 Stroke
6.200 Rod Length
.927 Wrist Pin Diameter
1.5 1.5 3.0 Rings
Nitrous - 150 H/P
Forced Induction - 10 lbs

Available Bore Sizes: 3.905
Price includes pistons, pins, locks and oil rail spacers (as required).

Autotec Forged Pistons_Chevrolet LS_Flat_1.053 C/H_3.905 through 4.125 Bore_-3.3cc_.927 Pin_15° Head

P/N: ATK-1000729_Base

V/R for 15° Heads
1.053 Compression Height
4.125 Stroke
6.125 Rod Length
.927 Wrist Pin Diameter
1.5 1.5 3.0 Rings
Nitrous - 150 H/P
Forced Induction - 10 lbs

Available Bore Sizes: 3.905, 4.005, 4.030, 4.065, 4.070, 4.125
Price includes pistons, pins, locks and oil rail spacers (as required).

Autotec Forged Pistons_Chevrolet LS_Flat_1.115 C/H_3.905 through 4.125 Bore_-3.3cc_.927 Pin_15° Head

P/N: ATK-1000727_Base

V/R for 15° Heads
1.115 Compression Height
4.000 Stroke
6.125 Rod Length
.927 Wrist Pin Diameter
1.5 1.5 3.0 Rings
Nitrous - 150 H/P
Forced Induction - 10 lbs

Available Bore Sizes: 3.905, 4.005, 4.030, 4.065, 4.070, 4.125
Price includes pistons, pins, locks and oil rail spacers (as required).

Autotec Forged Pistons_Chevrolet LS_Flat_1.315 C/H_3.898 through 4.070 Bore_-3.3cc_.927 Pin_15° Head

P/N: ATK-1000593_Base

V/R for 15° Heads
1.315 Compression Height
3.622 Stroke
6.125 Rod Length
.927 Wrist Pin Diameter
1.5 1.5 3.0 Rings
Nitrous - 150 H/P
Forced Induction - 10 lbs

Available Bore Sizes: 3.898, 3.905, 3.908, 4.005, 4.010, 4.020, 4.030, 4.040, 4.060, 4.065, 4.070
Price includes pistons, pins, locks and oil rail spacers (as required).

Autotec Forged Pistons_Chevrolet LS_Flat_1.340 C/H_3.898 through 4.030 Bore_-3.3cc_.945 Pin_15° Head

P/N: ATK-1000587_Base

V/R for 15° Heads
1.340 Compression Height
3.622 Stroke
6.098 Rod Length
.945 Wrist Pin Diameter
1.5 1.5 3.0 Rings
Nitrous - 150 H/P
Forced Induction - 10 lbs

Available Bore Sizes: 3.898, 3.908, 4.000, 4.005, 4.010, 4.030
Price includes pistons, pins, locks and oil rail spacers (as required).

Autotec Forged Pistons_Chevrolet LS7_Flat_1.053 C/H_4.125 and 4.130 Bore_-4.1cc_.927 Pin_12° Head

P/N: ATK-1000748_Base

V/R for 12° Heads
1.053 Compression Height
4.125 Stroke
6.125 Rod Length
.927 Wrist Pin Diameter
1.5 1.5 3.0 Rings
Nitrous - 150 H/P
Forced Induction - 10 lbs

Available Bore Sizes: 4.125, 4.130
Price includes pistons, pins, locks and oil rail spacers (as required).

Autotec Forged Pistons_Chevrolet LS7_Flat_1.115 C/H_4.125 and 4.130 Bore_-4.1cc_.927 Pin_12° Head

P/N: ATK-1000746_Base

V/R for 12° Heads
1.115 Compression Height
4.000 Stroke
6.125 Rod Length
.927 Wrist Pin Diameter
1.5 1.5 3.0 Rings
Nitrous - 150 H/P
Forced Induction - 10 lbs

Available Bore Sizes: 4.125, 4.130
Price includes pistons, pins, locks and oil rail spacers (as required).

Autotec Forged Pistons_Chevrolet LS7_Flat_1.163 C/H_4.125 and 4.130 Bore_-4.1cc_.927 Pin_12° Head

P/N: ATK-1000744_Base

V/R for 12° Heads
1.163 Compression Height
4.000 Stroke
6.077 Rod Length
.927 Wrist Pin Diameter
1.5 1.5 3.0 Rings
Nitrous - 150 H/P
Forced Induction - 10 lbs

Available Bore Sizes: 4.125, 4.130
Price includes pistons, pins, locks and oil rail spacers (as required).