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Premium Engine Valves for Global Applications

Manufactured with precision since 2008 — trusted by automotive, industrial, and heavy machinery sectors worldwide. 5 million valves produced annually with 400% zero-defect quality control.

Company Profile

Shijiazhuang Lei Ao Automobile Parts Co., Ltd. — a trusted manufacturer of high-performance engine intake and exhaust valves since 2008.

Factory Display

Precision Engineering Since 2008

With over 15 years of experience in engine component manufacturing, Lei Ao specializes in producing durable, high-tolerance intake and exhaust valves for a wide range of applications — from passenger vehicles to heavy industrial machinery.

In 2018, we upgraded all machine tools with numerical control systems to enhance dimensional accuracy and consistency across production batches. This investment ensures every valve meets strict OEM specifications.

Our annual production capacity exceeds 5 million valves, serving clients in automotive, diesel, gas, and industrial engine markets globally.

  • 15+ Years of Manufacturing Expertise
  • 5 Million Valves Produced Annually
  • CNC-Upgraded Production Lines (2018)
  • Full Range: Gasoline, Diesel, and Gas Engines

Featured Products

High-performance engine valves for BMW, Mercedes-Benz, Toyota, Komatsu, Caterpillar, and more. Precision-machined for reliability and longevity.

BMW N55B30 Engine Valve

BMW N55B30 Valve

High-strength alloy steel valve for turbocharged inline-6 engines. Resistant to thermal fatigue and wear.

  • Material: 21-4N Stainless Steel
  • Application: BMW 335i, 535i, X6 xDrive35i
  • Compatibility: Intake & Exhaust
Mercedes Benz 278.157 Valve

Mercedes Benz 278.157 Valve

Precision-engineered valve for V8 M278 engines. Designed for high RPM stability and long service life.

  • Material: Inconel 751 (Exhaust)
  • Application: S-Class, CLS, GL, ML
  • Standard: OEM Tolerance ±0.01mm
Komatsu 6D105 Valve

Komatsu 6D105 Valve

Heavy-duty diesel engine valve built for construction and mining equipment. High resistance to corrosion and impact.

  • Material: 4Cr9Si2Mo (Exhaust)
  • Application: Excavators, Bulldozers
  • Hardened Tip: Stellite-coated
Toyota 2ZR Engine Valve

Toyota 2ZR Valve

Reliable valve for 1.8L and 2.0L Dual VVT-i engines. Optimized for fuel efficiency and emissions control.

  • Material: 40Cr9Si2 (Intake), 21-4N (Exhaust)
  • Application: Corolla, Matrix, Scion
  • Production: CNC Precision Machined
Caterpillar C7.1 Valve

Caterpillar C7.1 Valve

Industrial-grade valve for off-highway diesel engines. Designed for extreme operating conditions.

  • Material: 5083 Aluminum Alloy (Intake)
  • Application: Generators, Pumps, Agricultural
  • Testing: 100% Leak & Dimensional Test
Honda K24W1 Valve

Honda K24W1 Valve

Performance valve for Accord VIII 2.4L engines. Enhanced durability under high thermal loads.

  • Material: 23-8N (Exhaust), 4Cr9Si2 (Intake)
  • Application: Honda Accord, CR-V
  • Finish: Micro-polished Stem
Mitsubishi 4G64 Valve

Mitsubishi 4G64 Valve

Robust valve for 2.4L inline-4 engines. Ideal for both OEM replacement and performance upgrades.

  • Material: 21-4N Stainless Steel
  • Application: Eclipse, Galant, Lancer
  • Process: 20-Step Quality Control
Hyundai G4KE Valve

Hyundai G4KE Valve

High-efficiency valve for Gamma-series engines. Ensures optimal valve seating and longevity.

  • Material: 40Cr9Si2Mo (Exhaust)
  • Application: Elantra, Sonata, Tucson
  • Coating: Nitride Surface Treatment

Why Choose Lei Ao?

From raw material selection to final inspection, every valve undergoes rigorous quality control to ensure reliability and performance.

Quality Guarantee

12-month or 30,000 km warranty. 400% zero-defect process control ensures unmatched reliability.

20-Step Process

Each valve passes through 20 precision manufacturing and inspection stages for consistency.

Fast Delivery

No MOQ for stock items. Custom orders delivered in 10–30 days.

Global Support

Serving clients in Europe, Asia, North America, and Africa with responsive technical support.

15+
Years in Business
5M+
Valves Annually
20+
Engine Brands
400%
Quality Control

Frequently Asked Questions

Get answers to common questions about our engine valves and services.

What materials are used in your engine valves?

We use high-grade materials including 21-4N stainless steel for exhaust valves, 40Cr9Si2 for intake valves, and Inconel alloys for high-performance applications. All materials meet or exceed OEM standards.

Do you offer custom valve manufacturing?

Yes, we provide OEM/ODM services. Custom designs, materials, and dimensions are available with a lead time of 10–30 days depending on complexity.

What is your warranty policy?

We offer a 12-month or 30,000 km warranty on all valves, whichever comes first. Claims are processed promptly with proof of installation and failure analysis.

Can I order small quantities?

Yes, there is no minimum order quantity for in-stock items. We support sample orders and small batch purchases for testing and evaluation.

How do I install your valves correctly?

Refer to our official installation guide available on leiaoparts.com. Always clean valve seats, use proper torque specs, and avoid contamination during installation.

Get in Touch

For inquiries, quotes, or technical support, visit our official website to contact the Lei Ao team directly.

Phone:

0086 13273188110

Email:

zhouzejia39@gmail.com

Address:

Shijiazhuang, Hebei Province, China

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