4089669 Cummins Piston Kit for ISB QSB 6BT Engines

Part Number : 4089669
Fitment : Cummins 6BT ISB QSB Series
Product Name : Piston Kit
Quality Standard : Genuine Cummins Quality
Lead Time : 3-15 Days Global Shipping
Pricing : China Cummins Wholesale Price
Payment Terms : T/T, Western union, Paypal
MOQ : Bulk Orders Accepted
Product description：Cummins 4089669 Piston Kit for ISB QSB 6BT (Dodge Ram 2500/3500) Engine.Produced by Cummins China, 100% genuine original parts with competitive pricing.
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Product Overview:

Cummins 4089669 is a DCEC STD piston kit for ISB5.9,QSB5.9, 6BT5.9 and 24V high-pressure common rail engines. Built for medium & heavy-duty applications with outstanding durability and reliability, it adopts reinforced structure and premium surface treatment to resist high combustion pressure, ensure tight sealing, low oil consumption and superior heat resistance. Suitable for heavy pickups, construction machinery, generator sets and commercial vehicles.

4089669 piston kit Specification:

Item	Specification
Part Number	4089669 (STD Piston Kit)
Compatible Engines & Fitment	DCEC 4BT3.9, 6BT5.9, ISB5.9 QSB5.9; 2004.5–2007 Dodge Ram 2500/3500 5.9L
Core Dimensions	Bore 102mm, Stroke 120mm
Compression Ratio	17.3:1
Material	High-silicon cast aluminum alloy
Structure Design	3-ring design, 155° combustion chamber spray angle
Kit Contents	Piston body, ring set, piston pin, circlips
Performance Rating	Rated for 1600 bar fuel pressure; factory power 160–325 HP; max safe upgrade 350–400 HP
Key Features	Hard anodized ring groove, graphite-coated skirt, strict weight tolerance ±5g
Application Scope	Medium & heavy-duty scenarios; not for extreme racing use