AP4 Group – Full-Service Heavy-Duty & Aeroderivative Industrial Gas Turbine Maintenance Provider.

The Leading Source of Heavy-Duty Gas Turbine Parts + Support

AP+M is able to meet your need for heavy-duty gas turbine parts wherever + whenever by combining our extensive, in-stock GE™ and Siemens™ turbine parts inventory with fast access to reliable, global sourcing partners.

All of our in-stock heavy-duty turbine parts are available for immediate delivery with capabilities to ship 24/7.

All parts provided by AP+M are guaranteed with a warranty of 18 months from delivery date or 12 months from installation.

guaranteed warranty


To complement our large heavy-duty turbine parts inventory, we also offer original OEM-approved repair and overhaul services along with technical support to all customers.

GE™ Parts

From control cards to engine accessories, AP+M has the genuine GE™ parts to support your operations. We provide parts and services for the following heavy-duty engine types:

AP+M provides high-quality, genuine parts and servicing needs for Siemens™ W501F engines.

Search our GE™ & Siemens™ Parts Inventory Here

Drop us a line today for a free quote!


We offer reliable solutions for profitability and focus on helping you meet your sustainability objectives. Whether it is OEM parts you need for a planned power outage, or a team of experienced field service engineers, AP4 has your power generation requirements covered

Natural Gas accounts for almost a quarter of the World's energy consumption. Due to the harsh environment these platforms are in, it is imperative to have a responsive partner who is able to meet your needs and ensure your operations runs efficiently

AP+M has been supporting LM2500s in commercial and naval marine applications for 30+ years.  AP+M's complete range of genuine OEM spare parts, component repairs and experienced field service engineers keep the navies, passenger cruise lines and other commercial ships powered by the LM series gas turbines operating around the world


Global Reliability

Our ability to procure genuine OEM parts from our global network of industrial gas turbine part manufacturers allows us to source and same-day deliver your heavy-duty and aeroderivative parts needs, wherever + whenever.

Integrated Solutions

AP4 Energy is your go to partner for all of your Industrial Gas turbine needs. Whether you're looking for OEM parts or expert field technicians, AP4 Energy can provide you a wide range of solutions and synergy to meet and exceed your companies needs

Quality Controlled Parts

AP+M maintains stringent quality control systems in place. Our certifications include:

  • ISO 9001 Certification
    • Quality Management
  • AS9100 Certification
    • Aerospace and Defense