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CP Acura Honda B20 Pistons (or Sleeved B18)

CP Acura Honda B20 Pistons

The CP Pistons brand B20 and Sleeved B18 block pistons listed on this page are for use with the Acura, Honda B20 block and also with a B18 block which has been sleeved to allow the use of larger bore sizes. They are made to work with and B16a, B18c or B20 cylinder heads. The compression ratios listed in the table below are for the B16A and B18C heads. If you use the B20 head your compression ratio will be .25 less than shown. This is due to the B20 head having a larger combustion chamber.

These forged 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 Carrillo products represent the highest quality and are engineered for maximum power. Pistons can be ordered with gas ports, skirt coating, ceramic top coating, and stronger wrist pins if desired. To order a set with any of these options, please include a message in the note section of the order form during our check out process, or you may contact us in advance for more info on these options.

CP 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 included
  • Fully CNC machined and balanced to +/- 1 gram
  • Wrist pins included at no additional cost
  • Double pin oilers force fed from oil ring groove
  • Pick lock grooves for easy lock removal
  • Pin fitting included

 

CP Forged B20 Pistons for B16A, B18C and B20 Cylinder Heads

Also for use in B18 blocks that have been sleeved to allow the larger bore sizes listed below.

CP B20 Pistons

  • Bore Size Cylinder bore size piston is designed to work in, listed in inches and millimeters
  • Relative Size Denotes whether this bore size is stock standard size, or an oversize listed in millimeters
  • CR Compression Ratio
  • Crankshaft Stroke Crank strokes the piston is designed to work with, listed in millimeters
  • Connecting Rod Length Rod lengths the piston will work with, in same order as crank stroke. For example, if you are using a 87.2mm crank, you should also be using a 138mm long rod. If you have the 89mm stroke crank, then you should use a 137mm length rod.
  • Wrist Pin Diameter 21mm
  • Compression Height 1.181 inches This is the distance from the centerline of the wrist pin bore to the top flat surface of the piston.
  • Ring Widths Ring grooves are machined to work with 1.0mm, 1.2mm, 2.8mm rings
  • WHAT’S INCLUDED 4 forged pistons, 4 Wrist Pins, pin retention locks and premium piston ring set

 

Bore
Inches
Bore
MM
Size
MM
Stroke
MM
Rod
Length
MM
Compression Piston Set
3.307 84 STD 87.2 / 89 138 / 137 9 SC7020

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3.327 84.5 +0.5mm 87.2 / 89 138 / 137 9 SC7021

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3.346 85 +1.0mm 87.2 / 89 138 / 137 9 SC7022

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3.307 84 STD 87.2 / 89 138 / 137 9.7 SC7017

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3.327 84.5 +0.5mm 87.2 / 89 138 / 137 9.7 SC7018

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3.346 85 +1.0mm 87.2 / 89 138 / 137 9.7 SC7019

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3.307 84 STD 87.2 / 89 138 / 137 FT(10.2) SC7002

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3.327 84.5 +0.5mm 87.2 / 89 138 / 137 FT(10.2) SC7003

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3.346 85 +1.0mm 87.2 / 89 138 / 137 FT(10.2) SC7004

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3.307 84 STD 87.2 / 89 138 / 137 11.5 SC7117

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3.327 84.5 +0.5mm 87.2 / 89 138 / 137 11.5 SC7118

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3.346 85 +1.0mm 87.2 / 89 138 / 137 11.5 SC7119

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3.307 84 STD 87.2 / 89 138 / 137 12.5 SC7120

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3.327 84.5 +0.5mm 87.2 / 89 138 / 137 12.5 SC7121

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3.346 85 +1.0mm 87.2 / 89 138 / 137 12.5 SC7122

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3.307 84 STD 87.2 / 89 138 / 137 12.7 SC7120X

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3.327 84.5 +0.5mm 87.2 / 89 138 / 137 12.8 SC7121X

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3.346 85 +1.0mm 87.2 / 89 138 / 137 13 SC7123X

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3.386 86 +2.0mm 87.2 / 89 138 / 137 13.2 SC7124X

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More general information about CP Carrillo and our complete listing of all available CP products is here > CP Pistons

Custom Acura Honda B20 Pistons

If you do not see a shelf stocking part number set here with the specifications that you need, we can provide you with a set of custom pistons built to your exact requirements. Please contact us if you would like to discuss a set of CP customs and we will be happy to work with you to insure you get exactly the B20 or sleeved big bore B18 block pistons that you need.

 

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