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You are here: Home > Engine Kits > Ford - 460 Big Block > 521/533 Cubic Inches - 4.300 Stroke > Flat Top

Flat top pistons in a 521/533 Ford engine will generally provide compression ratios in the 10.2:1 range with a 100cc head, which makes them a good option for engines with aluminum heads and larger than stock camshafts. Valve reliefs are configured to work with most types of standard and aluminum cylinder heads with OEM valve placement and will normally fit camshafts to slightly over .730 valve lift.

Villain - Cast Crank, through-bolt rods, forged pistons, designed for stock replacement and mild performance applications.

Vigilante - 4340 Forged Crank, I-Beam rods, forged pistons, designed for Street or Street and Strip performance applications.

Vindicator - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications.

Vanquisher - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications. All components are Made in the USA.
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Probe Vigilante Engine Kit
Vigilante Stroker Kit - Ford 521/533 - OEM Head - Flat Top - -3.0cc

P/N: 9104-11012          Internal Balance
  • Probe SRS Series 4032 Forged Pistons-1.350 C/H
  • Valve Reliefs for OEM cylinder heads
  • Probe 4.300 Stroke 4340 Forged Steel Crankshaft
  • Probe 6.800 ctc 4340 H-Beam Steel Rods
  • ARP 8740 Cap Screws
  • Internal Balance
  • Components rated at 750+ Horsepower
Available Bore Sizes: 4.390, 4.400, 4.420, 4.440
Ford 521/533 Flat top -3.0cc Vigilante Engine Kit
Vigilante Stroker Kit - Ford 521/533 - SCJ/Kaase Head - Flat Top - -3.0cc

P/N: 9104-14012          Internal Balance
  • Probe SRS Series 4032 Forged Pistons-1.350 C/H
  • Valve Reliefs for SCJ/Kaase cylinder heads
  • Probe 4.300 Stroke 4340 Forged Steel Crankshaft
  • Probe 6.800 ctc 4340 H-Beam Steel Rods
  • ARP 8740 Cap Screws
  • Internal Balance
  • Components rated at 750+ Horsepower
Available Bore Sizes: 4.390, 4.400, 4.420, 4.440
Probe Villain Engine Kit
Villain Engine Kit - Ford 521/533 - OEM Head - Flat Top - -3.0cc

P/N: 9004-11003
  • Probe SRS Series 4032 Forged Pistons-1.430 C/H
  • Valve Reliefs for OEM cylinder heads
  • Probe 4.150 Stroke Cast Steel Crankshaft
  • Probe 6.800 ctc 5140 Machined Beam Steel Rods
  • ARP 8740 Through Bolts
  • External Balance
  • Components rated at 600+ Horsepower
Available Bore Sizes: 4.390, 4.400, 4.420, 4.440
Probe Villain Engine Kit
Villain Engine Kit - Ford 521/533 - SCJ/Kasse Head - Flat Top - -3.0cc

P/N: 9004-14003
  • Probe SRS Series 4032 Forged Pistons-1.350 C/H
  • Valve Reliefs for OEM cylinder heads
  • Probe 4.300 Stroke Cast Steel Crankshaft
  • Probe 6.800 ctc 5140 Machined Beam Steel Rods
  • ARP 8740 Through Bolts
  • External Balance
  • Components rated at 600+ Horsepower
Available Bore Sizes: 4.390, 4.400, 4.420, 4.440
Probe Vindicator Engine Kit
Vindicator Stroker Kit - Ford 521/533 - Flat Top - OEM Head - -3.0cc

P/N: 9204-11021          Internal Balance
  • Probe PRS Series 2618-t6 Forged Pistons-1.350 C/H
  • Valve Reliefs for OEM cylinder heads
  • Probe 4.300 Stroke 4340 Forged Steel Crankshaft
  • Probe 6.800 ctc Lightweight I-Beam Forged Steel Rods
  • ARP-2000 Rod Bolts
  • Internal Balance
  • Components rated at 850+ H/P
Available Bore Sizes: 4.390, 4.400, 4.420, 4.440
Probe Vindicator Engine Kit
Vindicator Stroker Kit - Ford 521/533 - Flat Top - SCJ/Kaase Head - -3.0cc

P/N: 9204-21021          Internal Balance
  • Probe PRS Series 2618-t6 Forged Pistons-1.350 C/H
  • Valve Reliefs for SCJ/Kaase cylinder heads
  • Probe 4.300 Stroke 4340 Forged Steel Crankshaft
  • Probe 6.800 ctc Lightweight I-Beam Forged Steel Rods
  • ARP-2000 Rod Bolts
  • Internal Balance
  • Components rated at 850+ H/P
Available Bore Sizes: 4.390, 4.400, 4.420, 4.440