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Three medium-grit cylinder hose stones in grey abrasive finish

Powerbuilt

Powerbuilt 647361 3Pc 4 Cylinder Hose Stone Medium Grit No 220 valve

SKU CH-88T6-YDCYD

Three-piece set of medium-grit 220 valve hones for four-cylinder engines

  • Three-piece set covers four cylinders efficiently
  • Medium 220 grit hones valves to precise finish
  • Powerbuilt 647361 built for professional engine work
  • Hose stones reach tight ports without disassembly
  • California Proposition 65 warning informs safe handling

Three-piece valve kit

The Powerbuilt 647361 set contains three valves designed for four-cylinder hose applications. Medium grit number 220 stones provide controlled material removal during seating work. The kit suits technicians who service multi-cylinder engines and need matching components in one package. Condition is new.

Medium grit 220 specification

Grit number 220 defines the cutting aggression of each stone and decides whether the set matches the finish requirement for a given valve seat. Coarser grits remove material faster but leave a rougher surface; finer grits polish but cut slowly. Select this kit only when the job calls for medium 220 grit.

Workshop integration

The three valves install directly into standard four-cylinder hose assemblies without additional adapters. Each stone frees the operator from sourcing individual grit-matched pieces for every cylinder. California Proposition 65 warnings apply because the product contains chemicals known to cause cancer and reproductive harm.

Highlights

  • Three-piece set covers four cylinders efficiently
  • Medium 220 grit hones valves to precise finish
  • Powerbuilt 647361 built for professional engine work
  • Hose stones reach tight ports without disassembly
  • California Proposition 65 warning informs safe handling

Specifications

BrandPowerbuilt

Questions about this item

What does the 220 grit rating mean when I use these stones on a valve seat?

The 220 grit gives a medium cutting action that removes carbon and light pitting while leaving a finish smooth enough for lapping compound to finish the seat.

How does the hose connection limit what pilots or drivers I can use?

The flexible hose accepts the pilots and drivers supplied in the three‑piece set; other pilots with a different shank size will not engage the hose.

What physical space do I need to fit the stone and hose into a four‑cylinder head?

The hose and stone assembly is designed to reach valve seats through the spark‑plug or injector ports of typical four‑cylinder heads.

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