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Speed Pro Z8KH631CP30 - Speed-Pro Piston and Ring Kits

  • Piston/Ring Kit, Hypereutectic, Flat, 4.030 in. Bore, 5/64, 5/64, 3/16 in. Moly Ring, Chevy Small Block, Kit
  • Additional Info
    • Renamed Part: SLP-8KH631CP30
      The part TRW-8KH631CP30 has been renamed to SLP-8KH631CP30.
 
BrandSpeed Pro
Manufacturer's Part NumberZ8KH631CP30
Part TypePiston and Ring Kits
Product LineSpeed-Pro Piston and Ring Kits
Summit Racing Part NumberTRW-8KH631CP30
 
Bore (in)4.030 in.
Bore (mm)102.362mm
Piston StyleFlat top, with two valve reliefs
Piston MaterialHypereutectic aluminum
Compression Distance (in)1.560 in.
Piston Head Volume (cc)+5.00cc
Wrist Pin StylePress-fit or floating
Pin Diameter (in)0.927 in.
GaplessNo
File FitNo
Top Ring Thickness5/64 in.
Top Ring MaterialIron
Top Ring Facing MaterialMoly
Second Ring Thickness5/64 in.
Second Ring MaterialIron
Second Ring Facing MaterialCast iron
Oil Ring Thickness3/16 in.
Oil Ring MaterialStainless steel
Oil Ring TensionStandard
QuantitySold as a kit.
NotesDurOshield® coated piston skirt.
 

These Speed-Pro piston and ring kits include hypereutectic pistons (except where noted) and a set of matching moly-faced piston rings. The hypereutectic pistons are made from aluminum alloy with over 16 percent silicon content for strength and durability. They are precision diamond machined to run with traditional ring end gaps for maximum power and oil control, and a Dur-O-Shield coating reduces friction and eliminates scuffing and wear. Matching piston rings are included.