Cylinder Heads
Cylinder Heads
October 22, 2026
What is a remanufactured car engine?October 21, 2026
What is engine assembly?Evolution of the MZR Family’s Large-Displacement Engines: The Mazda L5 (commonly referred to by its full code name, L5-VE) is the largest naturally aspirated version (2.5L) in Mazda’s
MZR (L-Engine) aluminum alloy engine family, designed to replace the previous-generation 2.3L L3 engine.
Technical Background: The L5 engine was developed primarily by Mazda and shares its basic architecture with the Ford Duratec 25 / 2.5L platform. Building on the L3’s cylinder head design,
the L5 features an enlarged bore and stroke configuration, optimizing flow rates in the intake and exhaust ports.
Cylinder Head Technical Features: Constructed from lightweight, high-strength cast aluminum alloy, it features a dual overhead camshaft (DOHC) and 16-valve configuration.
It also integrates Mazda’s S-VT (Sequential Variable Valve Timing) system and a variable intake manifold (VIS), significantly enhancing torque output and fuel economy at low-to-mid RPM ranges.
Our products are exported to various parts of the country, and the customers we have worked with have received unanimous praise. The company has invested over 20 million yuan in high-end remanufacturing equipment imported from abroad and a first-class production team in the country. Our warehouse has a total area of over 8000 square meters, with scientific management and sufficient supply of goods.
Technical Specifications：
Engine Displacement: 2.5 L (2488 cc / 151.8 cu. in.)
Cylinder Configuration: Inline-4 (I4)
Valve Train: DOHC (Dual Overhead Camshaft), 4 valves per cylinder (16 valves total), with S-VT variable valve timing
Bore × Stroke: 89.0 mm × 100.0 mm
Compression Ratio: 9.7:1
Material: High-strength, lightweight cast aluminum alloy
Intake Configuration: Naturally Aspirated
Vehicle Applications：
Mazda 6 / Atenza ：2009–2013 (2.5L L5-VE)
Mazda 3 / Axela：2010–2013 (2.5L L5-VE)
Mazda CX-7：2010–2012 (2.5L Naturally Aspirated Version L5-VE)
Mazda 5：2012–2015 (2.5L L5-VE)
Mazda Tribute：2009–2011 (2.5L)
Ford Escape / Fusion / Ranger(Shares the Duratec 25 2.5L cylinder head architecture)
Mazda OEM Part Numbers:
L504-10-090, L504-10-090G, L50410090, L50410090G (Most common OE part numbers for the 2.5L L5-VE cylinder head assembly)
L504-10-271 (Cylinder head gasket/related assembly part number)
Final confirmation is required based on the vehicle’s VIN and engine code.
| Model Number | L5 |
| Place of Origin | Guangdong, China |
| Condition | New |
| Purpose | for replace/repair |
| Type | Gas / Petrol Engine |
| Power | OEM Standards |
| Quantity (pieces) | 1 - 10 | 11 - 50 | > 50 |
| Lead time (days) | 7 | 15 | To be negotiated |
1. Our remanufactured products use accessories provided by well-known brand suppliers such as VICTORREINZ, SCHAEFFLER, KS KOLBENSCHMIDT GmbH, etc.
2. Our product quality is close to the original factory quality, but the price is only 50-60% of the original engine. We can also provide you with a one-year or 100000 kilometer warranty service for the entire machine, and professional after-sales personnel will follow up with you.
3. We have over 15 years of experience in the production and research of automotive engines, and our technical level and personnel training are very scientific and mature. Customers who have worked with us have expressed their agreement with our products and after-sales service.
4. 2018 It has achieved an annual production capacity of 2200 units and has become a major supplier of high-end engine remanufacturing and parts in China's automotive aftermarket.
5. In April 2021, T/CAAMTB passed the certification company of China Automobile Research and Huacheng. 19-2019 Certification of the management system requirements of gas vehicle parts remanufacturing enterprisesIn October 2021, he became a member of the National Green Manufacturing Technology Standardization Committee and participated in the drafting of the Technical Specification for Assembly of Remanufacturing Mechanical and Electrical Products.
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