AUTOTEC BIG BLOCK MOPAR 383,440 FORGED PISTON SET (PART #RTC-1000566)

RaceTec AutoTec Forged Pistons

RaceTec's AutoTec line of forged pistons offers high-quality, precision manufactured options at competitive pricing. The primary material used for AutoTec pistons is 4032 high-silicone aluminum alloy which is extremely durable, has great wear resistance, a low expansion rate, and is very low in friction.

The most common applications for AutoTec pistons include muscle car restorations, performance street rods, as well as many spec racing classes. They can also withstand mild nitrous kits, small turbos, or superchargers. A large selection of sizes and styles is available. Choose the proper fit for your application build.

Additional features for most pistons in the AutoTec line:

  • CNC Precision machined ring grooves
  • Top ring land gas distribution groove to enhance performance and improve ring seal
  • Wrist pins, pin fitting, wire locks, broached pin oilers, and accumulator groove are included
  • Diamond turned skirts

SPECIFICATIONS

Engine Family Big Block Mopar 383,440
CID/Ltr 493/8.1
Bore Inch 4.35
Bore mm 110.49
Stroke Inch 4.15
Stoke mm 105.41
Rod Length 6.76
Comp Dist 1.87
Crown Volume -6.7cc
CR 1 12.9 @ 72cc
CR 2 12.1 @ 80cc
CR 3 11.0 @ 84cc
Alloy 4032
Weight 648
Pin 0.99
Oil Rails Included N/A
Top Ring 1/16"
2nd Ring 1/16"
Oil Ring HT 3/16"
Piston Style Flat Top, two valve reliefs

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