Product Overview

This is a premium-quality replacement piston designed specifically for the Cummins L9.3 and QSL9.3 diesel engines. Engineered for durability and performance, this piston is an essential component for engine rebuilds and overhauls in heavy-duty applications. We supply this part globally, with extensive experience serving key industrial markets across North America, Europe, the Asia-Pacific region, and the Middle East.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM specifications for a perfect fit and optimal engine performance.
• Superior Durability: Constructed from high-grade materials to withstand extreme temperatures and pressures within the combustion chamber.
• Enhanced Performance: Designed to maintain proper compression and efficient fuel combustion, contributing to engine power and fuel economy.
• Reliable Replacement: A direct-fit solution for restoring engine power and longevity in industrial, construction, and power generation equipment.
• Global Availability: Supported by our international logistics network for reliable delivery to workshops and distributors worldwide.

Technical Specifications

OEM Cross-Reference

This part is a direct replacement for the following OEM part numbers:

• Cummins: 5343091

Always verify the part number from your original component or engine serial number to ensure correct fitment.

Compatibility

This piston is specifically designed for the following Cummins engine models, commonly found in a wide range of heavy-duty machinery:

• Engine Models: Cummins L9.3, Cummins QSL9.3
• Typical Applications: Industrial generators, construction excavators, mining equipment, marine auxiliary engines, and heavy-duty trucks.
• Note: Compatibility can vary based on specific engine configuration and serial number. Consult your engine service manual or contact our technical support for verification.

Global Supply & Distribution

We are a trusted supplier in the global heavy-duty parts network. Our operations are optimized for international B2B trade:

• Worldwide Shipping: We export to all major industrial regions, including North America (USA, Canada, Mexico), the European Union, the United Kingdom, Australia, Southeast Asia, and the Middle East.
• Efficient Logistics: We ensure fast and reliable delivery to major ports and industrial hubs via established air and sea freight partners.
• Trade Compliance: All shipments are prepared with complete and accurate commercial documentation (invoice, packing list, certificate of origin) to ensure smooth customs clearance.
• Bulk & Wholesale: We support large order quantities for distributors, fleet operators, and rebuild shops with competitive pricing.

Quality Assurance

Every part we supply meets rigorous quality standards to ensure reliability in demanding applications.

• Manufacturing Standards: Produced in ISO-certified facilities using advanced machining and quality control processes.
• Material Certification: Raw materials are sourced to meet or exceed original specifications for strength and thermal properties.
• Dimensional Inspection: Each piston undergoes precise measurement checks to confirm critical tolerances for bore, pin diameter, and ring grooves.
• Warranty: Backed by a standard warranty against manufacturing defects. Please contact us for specific warranty terms applicable to your region.

FAQ

Q1: Is this piston sold as a single unit or as a set for the entire engine?
A1: This listing is typically for a single piston unit. For a full engine set, please contact our sales team to inquire about pricing and availability for the required quantity (e.g., 6 pistons for an inline-6 engine).

Q2: Do I need to purchase piston rings and the wrist pin separately?
A2: This depends on the specific part configuration. The part number 5343091 generally refers to the piston assembly, which may or may not include the pin and rings. It is crucial to confirm what is included in the supply. We can provide complete piston kits—please specify your requirements when ordering.

Q3: What is the recommended procedure when installing this replacement piston?
A3: Professional installation is required. Always follow the engine manufacturer’s service manual. This includes:

• Inspecting and measuring the cylinder liner for wear.
• Ensuring the new piston and rings are correctly matched and gapped.
• Using proper lubrication during assembly.
• Following the specified torque sequence and values for the connecting rod bolts.

We recommend sourcing all related components (rings, liners, bearings) from a single reputable supplier to ensure system compatibility.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .