Speed-Pro Powerforged Ford Pistons


Sealed Power
Speed-Pro Powerforged Ford Pistons

Product images may differ from actual product appearance.

Speed-Pro developed powerforged pistons and set the pace in powerforged technology. The high silicon VMS-75 alloy is found exclusively in pistons “powerforged” by Speed-Pro. Up to 3,000 tons of force forges aluminum slugs into the basic piston form which creates a grain flow pattern in the structure providing excellent strength, ductility and improved heat dissipation.

Please Note: All compression ratios are figured with a gasket thickness representative of those commonly used and are approximate.
Ford Performance Pistons
Sealed Power L2303NF30 - Speed-Pro Powerforged Ford Pistons
 		844-L2303NF30
428ci Stock-Type Piston, .030'' Overbore
  • Piston Dia.: 4.160''
  • Piston Top: -10.3cc Dish, 4-Valve Reliefs
  • Floating Pin
  • Comp Ratio: 10.66:1 w/68cc Heads, 10.07:1 w/74cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $51.99
    Manufacturer's
    Availability
    Date Unknown
      844-L2443NF
    		429ci - 460ci Stock-Type Piston
  • Piston Dia.: 4.360''
  • Piston Top: 12.1cc Dish, 4-Valve Reliefs
  • Pressed or Floating Pin
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $89.99
    Ships
    in 4 days
    Ford Stock-Type Pistons
    Sealed Power L2291F30 - Speed-Pro Powerforged Ford Pistons
         		844-L2291F30
    		390ci Stock-Type Piston, .030'' Overbore
  • Piston Dia.: 4.080''
  • Piston Top: Flat Top, 4-Valve Reliefs
  • Pressed or Floating Pin
  • Comp Ratio: 10.00:1 w/67.1cc Heads, 9.91:1 w/68.0cc Heads
  • Ring Grooves: 5/64'', 3/32'', 3/16''
  • Sold as Each
    		• $41.99
    Manufacturer's
    Availability
    Date Unknown
    Sealed Power L2305F - Speed-Pro Powerforged Ford Pistons
         		844-L2305F
    		302ci 1973-76 w/8.229'' Deck Height Piston, .000'' Overbore
  • Piston Dia.: 4.000''
  • Piston Top: -7.4cc Dish, 4-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 9.43:1 w/54.5cc Heads, 8.04:1 w/69cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
    		• $42.99
    Ships
    in 4 days
    Sealed Power L2305F30 - Speed-Pro Powerforged Ford Pistons
         		844-L2305F30
    		302ci 1973-76 w/8.229'' Deck Height Piston, .030'' Overbore
  • Piston Dia.: 4.030''
  • Piston Top: -7.4cc Dish, 4-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 9.56:1 w/54.5cc Heads, 8.14:1 w/69cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
    		• $43.99
    Manufacturer's
    Availability
    Date Unknown
    Sealed Power L2366F30 - Speed-Pro Powerforged Ford Pistons
         		844-L2366F30
    		429ci Stock-Type Piston, .030'' Overbore
  • Piston Dia.: 4.390''
  • Piston Top: Flat Top
  • Pressed or Floating Pin
  • Comp Ratio: 11.10:1 w/72cc Heads, 8.87:1 w/97cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $51.99
    Ships
    Monday
    Sealed Power L2379F - Speed-Pro Powerforged Ford Pistons
         		844-L2379F
    		351C Stock-Type Piston, .000'' Overbore
  • Piston Dia.: 4.000''
  • Piston Top: Flat Top, 2-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 10.63:1 w/58.6cc Heads, 8.79:1 w/76.2cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $39.99
    Ships
    in 4 days
    Sealed Power L2379F30 - Speed-Pro Powerforged Ford Pistons
         		844-L2379F30
    		351C Stock-Type Piston, .030'' Overbore
  • Piston Dia.: 4.030''
  • Piston Top: Flat Top, 2-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 10.76:1 w/58.6cc Heads, 8.90:1 w/76.2cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $39.99
    Ships
    Monday
      844-L2379F40
    		351C Stock-Type Piston, .040'' Overbore
  • Piston Dia.: 4.040''
  • Piston Top: Flat Top, 2-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 10.76:1 w/58.6cc Heads, 8.90:1 w/76.2cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $39.99
    Manufacturer's
    Availability
    Date Unknown
    Sealed Power L2404F30 - Speed-Pro Powerforged Ford Pistons
         		844-L2404F30
    		460ci Stock-Type Piston, .030'' Overbore
  • Piston Dia.: 4.390''
  • Piston Top: -22cc Dish
  • Pressed Pin
  • Comp Ratio: 9.79:1 w/72cc Heads, 8.01:1 w/97cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $42.99
    Manufacturer's
    Availability
    Date Unknown
    Sealed Power L2404F60 - Speed-Pro Powerforged Ford Pistons
         		844-L2404F60
    		460ci Stock-Type Piston, .060'' Overbore
  • Piston Dia.: 4.420''
  • Piston Top: -22cc Dish
  • Pressed Pin
  • Comp Ratio: 9.79:1 w/72cc Heads, 8.01:1 w/97cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $42.99
    Ships
    Monday
    Sealed Power L2443NF30 - Speed-Pro Powerforged Ford Pistons
         		844-L2443NF30
    		460ci Race Piston, .030'' Overbore
  • Piston Dia.: 4.390''
  • Piston Top: 12.1cc Dome
  • Pressed or Floating Pin
  • Comp Ratio: 10.55:1 w/92cc Heads, 10.09:1 w/97cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
    		• $53.99
    Ships
    Monday
    Sealed Power L2443NF60 - Speed-Pro Powerforged Ford Pistons
         		844-L2443NF60
    		460ci Race Piston, .060'' Overbore
  • Piston Dia.: 4.420''
  • Piston Top: 12.1cc Dome
  • Pressed or Floating Pin
  • Comp Ratio: 10.55:1 w/92cc Heads, 10.09:1 w/97cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
    		• $72.99
    Ships
    in 4 days
    Sealed Power L2446F30 - Speed-Pro Powerforged Ford Pistons
         		844-L2446F30
    		351W Stock-Type Piston, .030'' Overbore
  • Piston Dia.: 4.030''
  • Piston Top: -13.2cc Dish
  • Pressed Pin
  • Comp Ratio: 9.30:1 w/60.4cc Heads, 9.08:1 w/69cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $41.99
    Manufacturer's
    Availability
    Date Unknown
      844-L2446F40
    		351W Stock-Type Piston, .040'' Overbore
  • Piston Dia.: 4.040''
  • Piston Top: -13.2cc Dish
  • Pressed Pin
  • Comp Ratio: 9.30:1 w/60.4cc Heads, 9.08:1 w/69cc Heads
  • Ring Grooves: 1/16'', 1/16'', 3/16''
  • Sold as Each
    		• $41.99
    Ships
    in 4 days
    Sealed Power L2482F - Speed-Pro Powerforged Ford Pistons
         		844-L2482F
    		SB-Ford
  • Piston Dia.: 4.000''
  • Piston Top: -2.7, Flat 4-Valve Reliefs
  • Pressed Pin
  • Ring Grooves: 5/64'', 5/64'', 3/16''
    		• $37.99
    Ships
    in 4 days
    Sealed Power L2482F20 - Speed-Pro Powerforged Ford Pistons
         		844-L2482F20
    		SB-Ford
  • Piston Dia.: 4.000'', .020 Overbore
  • Piston Top: -2.7, Flat 4-Valve Reliefs
  • Pressed Pin
  • Ring Grooves: 5/64'', 5/64'', 3/16''
    		• $37.99
    Ships
    in 4 days
    Sealed Power L2482F30 - Speed-Pro Powerforged Ford Pistons
         		844-L2482F30
    		302ci Stock-Type Piston, .030'' Overbore
  • Piston Dia.: 4.030''
  • Piston Top: -2.7cc Dish, 4-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 9.42:1 w/60.4cc Heads, 8.55:1 w/69cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $37.99
    Manufacturer's
    Availability
    Date Unknown
    Sealed Power L2482F40 - Speed-Pro Powerforged Ford Pistons
         		844-L2482F40
    		302ci Stock-Type Piston, .040'' Overbore
  • Piston Dia.: 4.040''
  • Piston Top: -2.7cc Dish, 4-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 9.42:1 w/60.4cc Heads, 8.55:1 w/69cc Heads
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Sold as Each
    		• $37.99
    Manufacturer's
    Availability
    Date Unknown
    Sealed Power L2488F30 - Speed-Pro Powerforged Ford Pistons
         		844-L2488F30
    		1985-87 5.0L HO Stock-Type Piston, .030'' Overbore
  • Piston Dia.: 4.030''
  • Piston Top: Flat Top, 4-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 9.99:1 w/54.5cc Heads, 8.44:1 w/69cc Heads
  • Ring Grooves: 1.5mm, 1.5mm, 4.0mm
  • Sold as Each
    		• $43.99
    Ships
    in 4 days
    Sealed Power L2488F40 - Speed-Pro Powerforged Ford Pistons
         		844-L2488F40
    		1985-87 5.0L HO Stock-Type Piston, .040'' Overbore
  • Piston Dia.: 4.040''
  • Piston Top: Flat Top, 4-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 10.3:1 w/54.5cc Heads, 8.48:1 w/69cc Heads
  • Ring Grooves: 1.5mm, 1.5mm, 4.0mm
  • Sold as Each
    		• $43.99
    Ships
    in 4 days

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