CP Piston Kit

Kit includes CP-Piston, Piston Pin, Pin Clips, and Total Seal Conventional Rings with Optional Gapless top ring for an additional price.
Backorderd piston kits generally have a lead time of 4-6 weeks but may vary depending on CP-Carrillo work load.

11.5:1 Compression Ratio (89mm 10.5:1) w/ 47.6cc Chamber
Valve Pockets Cut For 37.5mm Intake & 32mm Exhaust For 89mm to 100mm Bore
Valve Pockets Cut For 40mm Intake & 34mm Exhaust For 102mm to 103.1mm Bore

89mm, 94mm, 97mm, and 102mm are designed for an aluminum bore.
98mm, 99mm, 100mm, and 103.1mm are designed for cast iron bore.


X-Forgings are designed to minimize friction and reduce weight without compromising strength. They have the side of the piston forged and their pin bosses moved inward toward the center, allowing the use of a shorter wristpin. With the use of different strut angles and bracing, an X-Forging is configured by adjusting the weight balance between high and low stress areas.

Total Seal Rings

  • 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

Optional Gapless Ring Set

  • Increased horsepower and torque
  • Longer engine life
  • Saves money (fewer teardowns)
  • Improved consistency
  • Longer ring life
  • Better oil control
  • Less Friction
  • Increased intake signal
  • Wider torque curve
  • More engine vacuum

Optional DLC Pin

  • Enhanced surface hardiness
  • Improved surface quality
  • Low friction coefficient
  • 100% Rockwell Tested
  • 1 Micron surface finish
  • Case hardened (computerized gas process)
  • Gun drilled I.D.’s with 3 stages of I.D. honing
  • Weight tolerances +/- 1 gram
  • Precision ground ends with I.D. radius
  • Cryogenically treated (subzeroheat-treating process) for
    improved material strength and grain structure