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Wossner Pistons

Wossner RSX Type-S & Civic Type-R K20A2/A3 & K20Z4 High Comp Forged Piston & H-Beam Steel Con Rod Package (K9088/G0362)

RSX Type-S & Civic Type-R K20A2/A3 & K20Z4 High Comp Forged Piston & H-Beam Steel Con Rod Package.

Manufacturer kit reference: K9088/G0362

RSX Type-S & Civic Type-R K20A2/A3 & K20Z4 High Comp Forged Piston Kit

Engine Code K20A2 / A3 /K20Z4
YOM From 2002
YOM To current
Bore Size 86.5mm – K9088D050 , 86mm – K9088DA , 87.5mm – K9088D150 , 87mm – K9088D100 , 88mm – K9088D200 , 89mm – K9088D300
Stroke 86mm
Compression Height 30mm
OEM Comp Ratio 11.5:1
Number of Rings 3
OEM Rod Length 139mm
Clip Part Number CW22
Pin Size 22mm
Pin Part Number WP017
Cylinders 4
Valves Per Cylinder 4

Honda K20A Type-R H-Beam Connecting rods

Engine Code K20A2 / A3 /K20Z4
Con Rod Length C/C 139mm
Con Rod Big End Dia 51mm
Con Rod Big End Width 19.80mm
Con Rod Small End Dia 22mm
Con Rod Small End Width 19.8mm
Con Rod Bolt 3/8"

Kit contents

  • RSX Type-S & Civic Type-R K20A2/A3 & K20Z4 High Comp Forged Piston Kit
  • Honda K20A Type-R H-Beam Connecting rods
  • ARP Bolt 3/8" Thread 1.5" UHL 2000 Series (4AJ1.500-2SU) × 8
  • ARP Assembly Lubricant (100-9908)

Piston specifications by size

Piston reference Piston diameter Compression ratio Capacity
K9088DA 85.93mm 12:1 1997cc
K9088D050 86.43mm 12.13:1 2021cc
K9088D100 86.93mm 12.26:1 2044cc
K9088D150 87.43mm 12.26:1 2068cc
K9088D200 87.93mm 12.26:1 2091cc
K9088D300 88.93mm 12.26:1 2139cc

Piston diameter and cylinder bore are different measurements. Select the correct size and confirm the engine specification before ordering.

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