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Latest news...

SJI Inc recognition award received from FCA North America

FCA North America nominated the american plant as one of the best supplier of the year! A great recognition of the know-how for SJI Inc...

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High-performance cylinder heads


The lateral low-pressure casting process, in which Saint Jean Industries Poitou is completely proficient, has been enhanced to achieve a higher level of performance.

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Turbine casing, compressor casing, central casing, etc.

Our prototyping and mass production workshops can meet your needs for the manufacture of steel, cast iron or aluminum turbocompressor parts, such as turbine casings (with or without integrated manifold), compressor casings, central casings, etc.

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Putting their trust in us...

Renault Weber automotive VW Peugeot Citroen Scania Behr Mahle Iveco MAN trucks Poclain Voith Bosch Mahle Turbo System Borg Warner Turbo System Honeywell Continental Mitsubishi Pierburg
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Engine business unit

This is one of Saint Jean Industries' websites dedicated to its activities in the design and manufacture of sub-assemblies to improve the efficiency of automobile, motorcycle, agricultural and heavy truck engines and powertrains.

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Plaquette SJI
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Our other business units...

Aluminum chassis and rims

Saint Jean Industries also provides innovative solutions for reducing the weight of aluminum chassis and rims.

Module de suspension

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Our products for engines

Below are the main powertrain products that we supply.

Please contact us regarding any other project connected with vehicle weight reduction and performance enhancement.

    cylinder head

    Cylinder heads


    Cylinder casings


    Engine mounts



    turbine housing






Comprehensive engineering studies

Saint Jean Industries is completely proficient in the engineering of its parts: from the design and validation of prototypes. to industrialization and the initiation of mass production, we serve as a one-stop shop.

  • design

    Our research department can design and optimize all types of engine parts.

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    Product design

  • simulation

    In liaison with the Product design branch and the Tooling branch, simulation validates the solutions chosen.

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    Our research department designs the tooling for each project.

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    Tooling development

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    Once the product and tooling have been defined, parts are validated on test benches to confirm the calculation results.

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    Product validation

Our technologies

With its roots in aluminum gravity casting, Saint Jean Industries has gradually integrated other technologies, from prototyping to machining.

  • aluminum casting

    Gravity die casting or low-pressure casting with or without a core.

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    Aluminum casting

  • cast iron/steel casting

    Manufacture of cast iron and steel cast parts using the shell molding (Croning) process.

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    Cast iron and steel casting

  • machining assembly

    Mass machining and assembly are integral parts of the group's sites.

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    Machining and assembly

  • prototyping

    Production of billet, aluminum sand cast, 3D printed or metal mold parts integrating machining and assembly.

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Read the rest of our news on the Saint Jean Industries group website and on social media.

Nous contacter

Saint Jean Industries SAS


icon 1 180, rue des Frères Lumière

69220 Saint Jean D'Ardières

icon 2 04 74 66 68 00

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Saint Jean Industries Poitou

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ZI de Saint Ustre

86 220, Ingrandes sur Vienne


icon 2 +335 49 93 77 00

Saint Jean Industries Laval

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Route de Fougères, ZA des Dahinières

53 810, Changé


icon 2 +332 43 64 15 15

Saint Jean Industries Lorraine Serial production

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430, Route de Mirecourt

88270 Harol


icon 2+33 329 66 84 08

Saint Jean Industries Lorraine Prototyping

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Allée 4, rue de l'industrie - ZI Inova 3000

88150 Thaon Les Vosges


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Saint Jean Industries d.o.o.

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Mile Budaka 1

35000 Slavonski Brod


icon 2 +385 35 405 320

Saint Jean Industries Leipzig

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Giessereistrasse 2

04519 Rackwitz


icon 2+49 342 94 70 60 10

Saint Jean Industries SAS

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180 rue des Frères Lumière

69 220, St Jean d'Ardières


icon 2 +334 74 66 68 00

Saint Jean Industries Inc.

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424 Industrial Park Drive

72543 Heber Springs (Arkansas)


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Saint Jean Industries Valladolid

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Ctra. Medina del Campo-Mojados, Km. 25

47250 Mojados, Valladolid


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