CP Piston Set 86.5mm Bore 10:0 CR Scion FR-S / Subaru BRZ / Toyota 86

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CP Pistons are compatible with oversized valves and high lift camshafts. Part numbers ending in a “X” are on a X-style forging for additional strength, durability and weight reduction. The X-style has a full radius dome design, high performance rings and light weight wrist pins. CP Pistons represent the highest quality and is engineered for maximum power. Pistons can be ordered with gas ports, skirt coating, ceramic top coating, and stronger wrist pins if desired. Cosmetic head gaskets also are available. Standard features include: Deep valve reliefs accommodate high lift camshafts; Larger valve reliefs for +1mm valve sizes; Custom skirt cam and barrel design; Accumulator grooves; High strength aluminum forgings; High performance rings; Fully CNC machined and balanced to +/- 1 gram; Wrist pins included at no additional cost; Double pin oilers force fed from oil ring groove; Pin lock grooves for easy lock removal; Pin fitting included.

  • Bore Size (mm): 86.50
  • Oversize (mm): +0.5
  • Stroke (mm): 86.0
  • Rod Length (mm): 129.3
  • Compression Height (in): 1.292
  • Dome / Dish CC: -11.4
  • Compression Ratio: 10.0
  • Gram Weight: 333
  • Piston Ring Size (mm): 1.0 x 1.2 x 2.8mm
  • Piston Rings (not included): CPN-3406
  • Cometic Head Gasket (not included): C4588-032 (RHS) / C4589-032 (LHS)
  • Made In: USA
  • Quantity: Sold as a kit.
  • Actual Product May Vary from Image.


  • Scion FR-S 2013-2016
  • Subaru BRZ 2013+
  • Toyota 86 2017+