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1000403 AutoTec Forged Inverted Dome/Milled Dish Piston Set for SB Ford 302 Flat Top Twisted Wedge Eng. [4.030 in. Bore]
InfoVehicle Info Needed
RACETEC PISTONSPART NUMBER: 613-1000403

1000403 AutoTec Forged Inverted Dome/Milled Dish Piston Set for SB Ford 302 Flat Top Twisted Wedge Eng. [4.030 in. Bore]

$79900
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Items You Need

Engine Assembly Lube [4 oz. Bottle]

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Engine Assembly Lube [4 oz. Bottle]

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Piston Ring Filer & Grinder Tool 170/140 Grit

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Piston Ring Filer & Grinder Tool 170/140 Grit

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Plastigauge Kit

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Plastigauge Kit

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Piston Ring Pliers Installs and Removes Rings without Breakage

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AutoTec Forged Piston Set
  • SB Ford 302 Flat Top Twisted Wedge
  • 4.030 in. Bore
  • Forged 4032 Aluminum
  • 3.250 in. Stroke
  • 5.400 in. Rod Length
  • 1.165 in. Compression Height
  • -16 cc Crown Volume
  • 1.5 x 1.5 x 3.0 mm Ring Grooves
  • Set of 8

    Racetec 1000403 AutoTec Inverted Dome/Milled Dish Piston Set Features:

    • Manufactured from low-expansion, high-silicon, 4032 material with side reliefs that's excellent for street or strip applications
    • CNC Precision machined ring grooves for 1.5mm, 1.5mm, 3.0mm rings, unless otherwise indicated
    • Top ring land gas distribution groove to enhance performance and improve ring seal
    • 927-2700-51-15C wrist pins, pin fitting, wire locks, broached pin oilers and accumulator grooves are included at no extra charge
    • Diamond turned skirts

    RaceTec 1000403 Autotec Inverted Dome/Milled Dish Piston Set Specs:

    • Engine Family: Small Block Ford 302 Flat Top Twisted Wedge
    • Displacement reference: 331 cu. in. (5.4L)
    • Bore: 4.030 in.
    • Stroke: 3.250 in.
    • Rod Length: 5.400 in.
    • Compression Height: 1.165 in.
    • Crown Volume: -16 cc
    • Piston Style: Inverted Dome/Milled Dish
    • Alloy: 4032
    • Wrist Pin Diameter: 0.927 in.
    • Ring Grooves: 1.5 mm Top, 1.5 mm Second, 3.0 mm Oil

    RaceTec 1000403 AutoTec Inverted Dome/Milled Dish Piston Set Notes:

    • Requires RaceTec AT 4030 Ring Set or Equivalent (Sold Separately)
    • Compression Ratios:
      • 9.6 @ w/54 cc Heads
      • 9 @ w/60 cc Heads
      • 8.6 @ w/64 cc Heads
    • Includes oil rail supports

      • RaceTec AutoTec Series Pistons for Ford Applications – Precision 4032 Alloy Performance at an Unmatched Value

      RaceTec AutoTec Series Pistons for Ford applications deliver high-quality, precision-manufactured forged pistons designed for builders who demand performance, durability, and affordability. Crafted from 4032 high-silicone aluminum alloy, these pistons offer excellent wear resistance, low expansion rates, and reduced friction, featuring diamond-turned ring grooves and skirts made on the same advanced equipment as RaceTec’s premium line. Engineered for muscle car restorations, performance street rods, and spec racing classes, AutoTec pistons handle mild nitrous, small turbo, or supercharged applications, with proven results exceeding 850+ horsepower in small block builds. Choose RaceTec AutoTec Series Pistons for those seeking a trusted, high-value performance solution.

    Part TypePiston
    Product LineRaceTec AutoTec Series Pistons for Ford
    BrandRACETEC PISTONS
    Package Height6.0
    Package Width12.0
    Package Length12.0
    Weight12.0 PG
    Part CategoryPerformance Parts
    Pin Lock Rings IncludedYes
    Compression Height (In)1.165
    Bore (In)4.03
    Wrist Pin StylePress or Full Floating
    QuantitySet of 8
    Piston Head Volume-16cc
    Engine Make/SizeFord Small Block
    Piston StyleInverted Dome/Milled Dish
    Compression Ratio54cc-9.6, 60cc-9, 64cc-8.6
    Ring Thickness1.5 x 1.5 x 3.0 mm
    Piston MaterialForged 4032
    Pin Diameter (In)0.927
    Part FitmentSemi Universal
    Wrist Pin IncludedYes
    Snap Rings IncludedYes
    Vendor Part Number1000403
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
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