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Autotec_Ford 302W Big Bore_Dish_1.165 C/H_3.250 Stroke_5.400 Rod_4.125 through 4.155 Bore_-19.7cc_.927 Pin_20° Head
Autotec Forged Pistons

Photo is a representative image


Available Part Numbers/Bore

ATK-1000344 - 4.125
ATK-1000345 - 4.145
ATK-1000346 - 4.155
Autotec 4032 Forged Pistons
Autotec Series forged pistons are a high quality, precision manufactured, piston option that comes in at an extremely competitive price. Autotec design specific forgings allows the manufacture of parts with less machine time, reducing production costs which, in turn, allows the savings to be passed on to you. Manufactured on American made, premium, high silicon 4032 aluminum alloy piston forgings, Autotec forged pistons provide great wear resistance, with low expansion rates, excellent durability and low rates of friction.

Minor bore and compression distance changes can be made to any shelf part at no extra charge.

Custom applications are also available. Additional cost and manufacture times may apply.

Allow two to four weeks for manufacture.

Add a Total Seal Performance Ring here

Item# Item Name Price Qty Add
ATK-1000385 Atec Piston_Ford 347W_Dish_20° Head_4.125 Bore_1.165 C/H_-19.7cc
ATK-1000386 Atec Piston_Ford 351W_Dish_20° Head_4.145 Bore_1.165 C/H_-20.6cc
ATK-1000387 Atec Piston_Ford 353W_Dish_20° Head_4.155 Bore_1.165 C/H_-21.0cc
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Technical Specs:
Item Code ATK-1000385_Base
Vendor Racetec Pistons
Product Type Pistons
Product Model Autotec
Nitrous 150 H/P
Forced Induction 10 lbs
Engine Displacement 347 - 353
Engine Family Ford - 302 Windsor
Material 4032
Bore 4.125 through 4.155
Stroke 3.250
Rod Length 5.400
Compression Height 1.165
Top Type Dish Top
Net Piston Volume -19.7
Deck Thickness .210
Valve Pocket Location 20°
Valve Pocket Cutters 2.400 intake / 2.000 Exhaust
Valve Pocket Depth .290 intake / .129 Exhaust
Weight 447 to 451
Wrist Pin Type 51 Series Steel - Straight Wall
Wrist Pin Diameter .927
Wrist Pin Length 2.700
Wall Thickness .150
Wrist Pin Weight 126
Pin Oilers Broached
Pin Lock Type Wire
Oil Rail Support Yes
Rings Included No
Ring Grooves 1.5 - 1.5 - 3.0
Ring Lands .250 - .150 - .090
Quantity Sold in sets of 8
Minimum Order Quantity 4 (each)

Compression Ratio:

Cylinder Head Volume
Part Number Net cc 54cc 60cc 64cc
ATK-1000385 -19.7 9.6 9.0
ATK-1000386 -20.6 9.6 9.0
ATK-1000387 -21.0 9.6 9.0 8.6

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Pistons > Autotec Forged Pistons > Ford > Ford - 302 Windsor > Dish Top
Pistons > Autotec Forged Pistons > Ford > Ford - 302 Windsor > Dish Top > Standard 20° Head