Product Overview

This is a genuine specification exhaust pipe bolt, part number 3901757, engineered for Cummins QSL9 diesel engines. Designed for heavy-duty applications, this critical fastener ensures a secure and leak-free seal for exhaust system components. We supply this part globally to distributors, workshops, and fleet operators in key industrial markets, ensuring reliable performance in demanding conditions.

Key Features & Benefits

• Precision Fit: Manufactured to exact OEM dimensions (OEM Size) for guaranteed compatibility and easy installation on Cummins QSL9 engines.
• High-Temperature Durability: Constructed from robust materials designed to withstand the extreme heat and vibration cycles of diesel exhaust systems.
• Secure Sealing: Ensures a tight, reliable seal at the exhaust manifold or pipe connection, preventing exhaust leaks and maintaining engine performance and emissions compliance.
• Cost-Effective Solution: Offers a high-quality, direct-fit replacement at a competitive price, reducing downtime and maintenance costs for heavy machinery and vehicles.
• Rigorous Quality Control: Each batch is subject to machinery tests and video outgoing-inspection to verify dimensional accuracy and material integrity.

Technical Specifications

OEM Cross-Reference

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

• Cummins: 3901757

Note: Always cross-reference with your engine’s specific build sheet or consult with a qualified technician to confirm exact fitment.

Compatibility

Primary Engine Application:

• Cummins QSL9 Diesel Engine

Typical Vehicle & Machinery Applications:

• Excavators
• Heavy-Duty Trucks
• Forklifts
• Bulldozers
• Buses & Coaches
• Loaders (Wheeled, Track)
• Other industrial and construction equipment powered by the QSL9 engine.

Global Supply & Distribution

We are a professional exporter of heavy-duty engine components with extensive experience in international logistics and trade compliance. Our streamlined supply chain ensures efficient delivery to major global markets.

• Worldwide Shipping: We ship to North America, Europe, Asia-Pacific, the Middle East, Africa, and South America.
• Fast Port Delivery: Priority shipping to major industrial hubs and ports including Rotterdam, Los Angeles, Singapore, Dubai, and Hamburg.
• B2B Focus: We specialize in bulk orders for distributors, large workshops, and fleet management companies, offering competitive FOB/CIF terms.
• Documentation: All necessary export documentation, including commercial invoices, packing lists, and certificates of origin, is provided.

Quality Assurance

Our commitment to quality ensures you receive reliable parts that meet performance expectations.

• Manufacturing Standards: Parts are produced to meet or exceed original specifications for material and dimensional tolerance.
• Comprehensive Warranty: Backed by a 6-month warranty against manufacturing defects.
• Inspection Protocols: Every production lot undergoes a Machinery Test Report. Additionally, Video Outgoing-Inspection is provided for key quality verification before shipment.
• Traceability: Clear batch coding and documentation for quality tracking.

FAQ

Q: How do I confirm this bolt will fit my specific Cummins QSL9 engine?
A: The part number 3901757 is the primary identifier. We recommend verifying this number against your engine’s service manual, existing removed part, or through your engine’s serial number via an authorized Cummins database or dealer to ensure 100% compatibility, especially for specific model years or configurations.

Q: What is the recommended installation torque for this exhaust bolt?
A: Always refer to the official Cummins service manual for the QSL9 engine for the exact torque specification and tightening sequence. Using the correct torque is critical to prevent damage to the bolt, exhaust manifold, or cylinder head, and to ensure a proper seal. General torque values for such applications are typically specified in ft-lbs or Nm and may require the use of a calibrated torque wrench.

Q: Do you provide technical support or compatibility guidance for international buyers?
A> Yes. Our technical sales team is experienced with global engine applications and can assist with basic compatibility questions. For complex fitment issues, we advise consulting with a local certified Cummins technician who can account for regional engine variations and local regulations.

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 .