One-Stop Solutions for Spark Plugs

With 30+ years of engineering and reverse engineering experience, MS-Marshal delivers high-performance, precision-manufactured spark plugs for automotive, marine, motorcycle, and industrial applications.

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30+ Years Expertise

Proven engineering and reverse engineering capabilities in spark plug design and manufacturing.

TUV & RoHS Certified

Electrodes meet international safety and environmental standards including TUV, RoHS, and REACH.

Advanced Testing Lab

Complies with 17 international standards and conducts over 34 internal OEM-level tests.

About MS-Marshal

NINGBO MARSHAL AUTO PARTS CO., LTD. is a professional manufacturer integrating research and development, production, and sales of spark plugs. Our products are widely used in gasoline, natural gas, and liquefied petroleum gas engines across automotive, marine, motorcycle, and industrial sectors.

With decades of experience, we specialize in custom OEM spark plug solutions, ensuring precise application matching and complete fitment coverage for global markets.

30+ years of engineering and reverse engineering experience
In-house ceramic insulator production with 360° continuous laser technology
Full compliance with international quality and environmental standards
Over 1.2 billion units annual production capacity

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Product Advantages

Complete Coverage Fitment

Our spark plugs are engineered to match OEM specifications across thousands of vehicle models and engine types.

Precise Application Matching

Each plug is designed for optimal thermal performance, ignition efficiency, and longevity in its intended application.

The Real Materials

High-strength insulators, premium electrodes, and hardened shells ensure durability and performance under extreme conditions.

Precision Manufacturing

Utilizing advanced automation and strict process control for consistent quality across all production batches.

Competitive Best Choice

High-performance alternatives to original equipment at competitive pricing for OEMs and aftermarket suppliers.

Guaranteed After-sales

Comprehensive support and quality assurance backed by decades of industry trust and technical expertise.

Our Products

K7RTJIP-CNG

Reach: 19mm
Thread Size: 14mm
Hex Size: 16mm
Application: Automotive (CNG)

K7RTC-CNG

Reach: 19mm
Thread Size: 14mm
Hex Size: 16mm
Application: Automotive (CNG)

F7RTP

Hex Size: 16mm
Application: Automotive
Material: Nickel Alloy Electrode
Insulator: High-Density Alumina

K6RTQYB

Reach: 19mm
Application: Automotive
Design: Resistor-Type
Compatibility: OEM Replacement

Marine Series

Corrosion-Resistant shell
Enhanced Sealing for wet environments
Optimized Gap for marine engines
Compliant: ISO 8846, ABYC

Motorcycle Series

Compact Design for tight spaces
High-Fire Performance for RPM stability
Heat Range Options: Hot & Cold
Applications: Scooters, Bikes, ATVs

Lawn & Garden

Robust Shell for vibration resistance
Self-Cleaning Design for small engines
Compatibility: Mowers, Trimmers, Blowers
Standard Sizes: 10mm, 12mm, 14mm

Industrial Series

Heavy-Duty Construction
Extended Life Cycle under continuous operation
Applications: Generators, Pumps, Compressors
Custom Electrode Alloys available

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Advanced Manufacturing & Technology

In-House Ceramic Insulator Production

We operate our own ceramic factory, enabling full control over insulator quality. Our high-density alumina insulators offer superior dielectric strength and mechanical durability.

360° Continuous Laser Sealing Technology
Thickened Insulator Nose Design
Enhanced Thermal Shock Resistance

Rigorous Quality Testing

Our laboratory complies with 17 international and national spark plug test standards, ensuring every product meets or exceeds OEM requirements.

Over 34 internal OEM-level type tests
Full process inspection coverage
ISO 9001 Certified Quality Management System

Frequently Asked Questions

What makes MS-Marshal spark plugs different?

We control the entire production chain, including ceramic insulator manufacturing. Our 30+ years of reverse engineering experience and compliance with international standards ensure OEM-level quality and performance.

Do you offer custom OEM spark plugs?

Yes, we specialize in custom OEM solutions for automotive, marine, motorcycle, and industrial applications. We support full technical documentation and sample development.

Are your products environmentally compliant?

Yes, our electrodes comply with RoHS and REACH regulations. We are committed to sustainable manufacturing practices and material safety.

What certifications do you hold?

We have passed TUV certification, maintain ISO 9001 quality management system certification, and hold multiple design and utility model patents for our spark plug technologies.

Contact MS-Marshal

Get in touch for OEM partnerships, product inquiries, or technical support.

Company: NINGBO MARSHAL AUTO PARTS CO., LTD.

Address: 228 Pengmin Branch Road, Pengqiao Village, Henghe Town, Cixi City, Zhejiang Province, China

Phone: +86-574-63834016

Fax: +86-574-63834090

Email: info@ms-marshal.com

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