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Engine & performance

Wiseco Honda B16A / B18 / B20 custom-build pistons — K594M855AP, 85.50 mm

New

€355

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Condition
New
Brand
Wiseco
Item reference
227295930633

Catalogue snapshot: 12 October 2026. Please confirm current availability with Nick's Garage.

Part identification

Research & application notes

Wiseco 85.50 mm forged piston set for a specified Honda B-series performance-build configuration, with 8550XX ring packs shown.

Research reviewed 18 October 2026Manufacturer catalogue geometry confirmed; custom engine build, not a stock-car fitment claim.

Checked by Nick’s Garage — owner-confirmed OK

Reference / label codesK594M855AP · 8550XX

Catalogue applications are not a guarantee for this exact supplier revision. Match VIN and full label before ordering.

Catalogue application reference

Model/Series
Honda B-series custom engine build · B16/B18/B20 VTEC configurations
Year
Not independently confirmed
Engine
B-series; assembly-specific
Transmission
Not independently confirmed
Market
Not independently confirmed
Catalogue scope
85.50 mm is not a standard 81 mm B16 bore. Match the machined/sleeved block, stroke, rod length, head chamber and pin before ordering; the same code appears under multiple catalogue build configurations.

Evidence statusConditional catalogue reference — Manufacturer catalogue geometry; custom-build application, not stock-vehicle fitment

Identification & application notes

  • The Wiseco manufacturer catalogue lists K594M855AP in multiple Honda B-series build tables. Haltech's direct product record describes the same code as a Honda B16A piston set.
  • The specified bore is 85.50 mm, compression height 30.00 mm, dome 8.30 cc and pin diameter 21 mm. Manufacturer notes require an appropriately sleeved block for the large-bore B16/B18 configurations.
  • B16A, B18 and B20/VTEC references describe different machined engine assemblies. They do not establish drop-in Civic, Integra or CR-V compatibility; compression ratio depends on the complete assembly.
  • The offered photograph confirms 8550XX ring packs, not the full piston-kit box number. Confirm the supplied piston code, machining dimensions and contents before ordering.

Confirm before ordering

These details remain unconfirmed for this individual item:

  • Readable full piston-kit box number on the offered set (listing states K594M855AP)
  • Donor/build stroke, rods, chamber volume, bore preparation and piston-to-wall clearance
  • Exact piston revision and supplied contents
Research sources & evidence scope (2)

Before you order

Match the exact part

Share your vehicle identification details, full component label and existing part number before ordering. Fitment, coding and installation must be confirmed separately. For magazines and non-automotive items, check the product description and photographs.