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1001608 AutoTec II Forged Dish Piston Set for Small Block Chevy 23-Degree Engines [4.030 in. Bore]
InfoVehicle Info Needed
RACETEC PISTONSPART NUMBER: 613-1001608

1001608 AutoTec II Forged Dish Piston Set for Small Block Chevy 23-Degree Engines [4.030 in. Bore]

$97700
ShippingShips on 12/14/2026
Lowest PriceLowest Price Guarantee

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AutoTec II Forged Piston Set
  • SB Chevy 23-Degree
  • 4.030 in. Bore
  • Forged 2618 Aluminum
  • 3.480 or 3.500 in. Stroke
  • 6.125 in. Rod Length
  • 1.125 in. Compression Height
  • -12.8 cc Crown Volume
  • 1.5 x 1.5 x 3.0 mm Ring Grooves
  • Set of 8

    Racetec 1001608 AutoTec II Dish Piston Set Features:

    • Manufactured on 2618 material forgings that will accept mild blown or nitrous applications
    • CNC Precision used in every manufacturing operation
    • Valve pockets machined for oversized valves and high lift cams
    • Critically machined ring grooves for 1.5, 1.5, 3.0mm rings
    • Top ring land gas distribution grooves to enhance performance and improve ring seal
    • 990-2800-51-15C wrist pins, pin fit, wire locks, broached double pin oilers, and accumulator groove are included at no extra charge
    • Diamond tooling used throughout production including ring grooves and skirts

    RaceTec 1001608 Autotec II Dish Piston Set Specs:

    • Engine Family: 23-Degree Small Block Chevy
    • Displacement reference: 357 cu. in. (5.9L)
    • Bore: 4.030 in.
    • Stroke: Both 3.480 or 3.500 in.
    • Rod Length: 6.125 in.
    • Compression Height: 1.125 in.
    • Crown Volume: -12.8 cc
    • Piston Style: Dish
    • Alloy: 2618
    • Wrist Pin Diameter: 0.927 in.
    • Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

    RaceTec 1001608 AutoTec II Dish Piston Set Notes:

    • Requires RaceTec RT4030 Ring Set or Equivalent (Sold Separately)
    • Compression Ratios:
      • 9.5:1 @ w/64 cc Heads
      • 9.1:1 @ w/68 cc Heads
      • 8.9:1 @ w/70 cc Heads

      • RaceTec AutoTec II Series Pistons for Chevy Applications: High-Strength 2618 Alloy Performance For Power-Adder Builds

      RaceTec AutoTec II Series Pistons are precision-manufactured from 2618 low-silicon aluminum alloy, delivering exceptional strength and durability at an extremely competitive price point. Designed using application-specific forgings and produced on the same advanced machinery as RaceTec and AutoTec lines, these pistons feature diamond-turned ring grooves and skirts for consistent performance under extreme conditions. The malleable nature of 2618 alloy makes AutoTec II pistons ideal for high-load, high-stress applications, including superchargers, turbochargers, and nitrous systems, with real-world builds exceeding 1000+ horsepower. The AutoTec II line delivers outstanding value for restorations, street performance, and spec racing engines.

    Part TypePiston
    Product LineRaceTec AutoTec II Series Pistons for Chevy
    BrandRACETEC PISTONS
    Package Height6.0
    Package Width12.0
    Package Length12.0
    Weight12.0 PG
    Part CategoryPerformance Parts
    Pin Lock Rings IncludedYes
    Compression Height (In)1.125
    Bore (In)4.03
    Wrist Pin StylePress or Full Floating
    QuantitySet of 8
    Piston Head Volume-12.8cc
    Engine Make/SizeChevy Small Block
    Piston StyleDish
    Compression Ratio64cc-9.5:1, 68cc-9.1:1, 70cc-8.9:1
    Ring Thickness1.5 x 1.5 x 3.0 mm
    Piston MaterialForged 2618
    Pin Diameter (In)0.927
    Part FitmentSemi Universal
    Wrist Pin IncludedYes
    Snap Rings IncludedYes
    Vendor Part Number1001608
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning