Our 5-12563025-6 valve seats solve the B2B pain point of power loss in 6BG1T engines. Built for EX200-5 excavators, these seats feature high-chromium alloys that prevent valve recession and surface pitting under the intense thermal cycles of heavy-duty mining and earthmoving tasks.
Item NO.:
5-12563025-6Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time:
2-3 DAYSFor wholesalers and agents, the 512563-0256 offers an OEM-standard solution that extends cylinder head life. Its superior heat dissipation and impact resistance reduce fleet maintenance costs, helping you build trust with clients who demand peak machinery reliability and zero downtime.
Product Features

Hardened Heat-Resistant Alloy Forged from premium chromium-alloy steel to prevent surface deformation and impact wear under the intense combustion cycles of the 6BG1T engine.
Superior Heat Dissipation The 512563-0256 allows rapid heat transfer from the valve to the cylinder head, preventing valve stem warping and extending valvetrain service life.
Micron-Precision Machining Features ultra-precise dimensional accuracy to ensure a 100% airtight seal with the valve face, restoring original engine compression and efficiency.
Stable Interference Fit Machined to strict tolerances to ensure the seat remains securely seated in the head during extreme thermal expansion and contraction cycles.
Direct OEM Interchangeability Manufactured to exact 1:1 original specifications for Isuzu 6BG1T engines, guaranteeing a seamless fit and immediate restoration of performance.
Product Specification
| Product Name | Engine Valve Seat Insert |
| OEM Part Number | 5-12563025-6 / 512563-0256 / 5125630256 |
| Engine Model | Isuzu 6BG1 / 6BG1-T / 4BG1 |
| Application | Isuzu NPR / NKR Truck, ELF Series, Excavators, Forklifts |
| Material | High-Strength Chromium-Nickel-Molybdenum Alloy |
| Installation Type | Direct Replacement (Standard OEM Size) |
| Thickness | Standard OEM Specification |
| Color | Silver Metallic / Natural Steel |
| Working Temperature | -60°C to 750°C (High-heat combustion resilience) |
| Key Function | Provides a hardened, heat-resistant sealing surface for the intake and exhaust valves. |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Neutral Packing / Customized Box |

Why Choose Us
1.We have profession isuzu team,more than 20 years experience business isuzu parts.
2. We can offer used and new isuzu genuine parts, oem,good quality made in china parts to you.
3. The isuzu genuine parts will give weight,price when quotation.
4.Isuzu genuine stock pictures will send before order.
5.All isuzu parts can check with part number,all parts can order follow part number.
6. Quick delivery time,in 24 hours if sotck.
7. Safe packing to protect the goods, such as wooden box, Iron sheet for our isuzu parts.
8. Small quantity can accept.Sample order also accept.
9. 24 hours oversea service.
10.Lifelong after-sales service.

Certificate



What's the shipping way you can offer?
1) Big order: By sea or by air.(It can reduce the costs)
2) Small order: DHL, TNT, UPS, FEDEX, EMS,ARAMEX

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