3.4 Iron Head Forged Pistons

3.4 Iron Head Forged Pistons

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Product Information

For those using Iron Heads on their GM 60V6, we have adjusted our pistons for either 8.5 or 11.5 compression ratings.  Custom is also available.  For the best factory style ring options, we have opted to not use the original iron head ring grooves in favor of the 3400 rings, which are the same width but a different depth.  For the best ring options, we use a 1.5/1.5/3.0 groove set for Total Seal rings. These are to a custom depth to match a more popular engine's piston, giving us better options that won't disappear soon. 

Pistons are a 2618 Alloy, designed with the clearance in mind for the bore size specificed.  We recommend measuring the pistons before the block is bore/honed to be certain of final clearances.  SBC size ( .927") 4130 pins come standard with each set.  Aftermarket rods are required with these pistons.  Top ring location compared to the crown is determined by application. 

Compression is based on 3.4 heads and stock .040" thick head gasket. 

Optional Upgrades


  • Skirt coating to reduce friction.  This is common for even stock replacement pistons and highly recommended
  • Thermal coating to crown to reduce heat transfer and keep the energy in the combustion chamber. 
  • Double Diamond hard anodize with skirt coating.  Our choice for max effort builds. 

Pin Upgrade

  • H13 Tool Steel with increased wall thickness compared to our standard pin.  Highly recommended for max effort engines.


  • Double Pin Oilers (Banana Groove).  Similar principle as an oil squirter, but using the natural motion of the engine to throw oil under the piston
  • Maxi-Lite internal mill.  As it sounds, reduces weight from the piston where it isn't necessary for strength.  This is great for high RPM.

Piston Rings

  • Mahle Premium Steel Ring Set
    • Carbon Steel First and Second
    • Stainless Oil Control Ring
    • Plama Moly Coated Top Ring
  • Total Seal Advanced Profile Steel Ring Set
    • Manufactured from 440B stainless steel
    • Stronger, Longer life and Most Precise Tolerances
    • Saves money (fewer teardowns)
    • Thinner, Flatter and Lighter
    • Conforms Better to the Cylinder Wall
    • Works well in all applications, notably dirt environments
    • Easier on cylinders, reducing bore wear
    • Uses C33 face coating: doesn't allows dirt to penetrate coating
    • Available in Gapless or Conventional
  • Total Seal Gapless Top Ring option reduces blowby, increasing power slightly.
  • Total Seal Napier 2nd Ring option improves oil control, and is recommended for all applications. Highly recommended for forced induction applications.

Piston Ring Groove

  • Depends on ring set to be used.  If no rings are purchased, this will be default as stock 60V6 grooves unless the 1.5/1.5/3.0 option is selected.  With ring purchase, grooves will be matched based on ring choice.
Product CodeDF34IHPistons

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