When it comes to fire truck manufacturing, many industry professionals are familiar with Avionic Structures of Indiana (ASI), which is known for its high-quality polished stainless steel bumpers. However, what’s often overlooked is that ASI is a division of Wiley Metal, a third-generation family-owned business based in Indiana with a much broader range of capabilities. While ASI focuses on the bumpers, Wiley Metal has spent over 40 years manufacturing more than 5,000 custom metal parts that support the entire fire truck build. These include everything from structural supports and extension panels to custom brackets and enclosures.
Wiley Metal is not just a supplier of parts; we’re a full-service fabrication partner with the capabilities, experience, and customer service required to support low- to mid-volume, high-customization vehicle manufacturing. For fire truck OEMs looking to streamline their builds, reduce supplier friction, and ensure precision across every fabricated component, Wiley Metal offers a complete solution.
1. ASI’s Reputation in the Fire Truck Industry
ASI is well known in the fire truck manufacturing world for producing polished stainless steel bumpers that combine exceptional durability with a mirror-like finish. These bumpers are prized by leading OEMs across the country for their strength, longevity, and appearance. What many don’t realize is that ASI operates under the Wiley Metal umbrella. That means the same commitment to quality and precision that defines ASI’s bumpers is also applied across thousands of other fabricated parts created by Wiley Metal.
2. Wiley’s Broader Fire Truck Fabrication Capabilities
While ASI focuses on bumpers, Wiley Metal has fabricated more than 5,000 different SKUs that can be found between those bumpers.
These components are custom-engineered to integrate seamlessly with OEM designs and are built with both durability and ease of installation in mind. Wiley works directly with manufacturers to ensure parts are made to exact specifications, often reviewing customer drawings and helping to identify opportunities for improved performance or simplified assembly.
3. Between The Bumpers
Fire truck manufacturing requires a wide range of precision metal components, many of which must be highly customized. While ASI provides what’s at the front and back of the truck, Wiley Metal supports the structure, functionality, and form of what’s between the bumpers. Our fabrication capabilities allow us to produce full assemblies and specialty components that serve a wide variety of functions throughout the truck.
This makes Wiley a valuable partner for OEMs who want a one-stop shop that understands the fire truck space. With thousands of parts produced for the industry already, we bring both experience and flexibility to every build.
4. How We Build: Wiley Metal’s In-House Advantage
At Wiley Metal, we don’t just make parts. We manage the full process under one roof. That means faster timelines, tighter quality control, and consistent results from start to finish.
We start with precision processing, using CNC turret punching, laser cutting, and press brake forming to work across steel, stainless, aluminum, polymers, composites, even wood. Our material handling systems keep everything moving safely and efficiently through each phase.
From there, our team tackles complex forming, welding (MIG, TIG, robotic, and spot), and finishing. Whether it’s powder coating, painting, or galvanizing, we match the method to the part’s purpose, balancing durability and appearance.
Every part goes through inspection by our quality control team to ensure it meets spec before it’s packaged and shipped. We also offer tailored packaging and reliable delivery to fit your production schedule.
Need more than just fabrication? We provide integrated support from prototyping and quoting to long-term planning. And when you need something unique, our specialty services are ready to deliver.
You’ll find our work in semi-truck trailers, RVs, utility trucks, and fire apparatus. Through our ASI division, we make polished stainless steel bumpers, but we’ve also fabricated more than 5,000 SKUs that go behind those bumpers over the last 40+ years.
Wiley Metal brings the process, the people, and the precision to build what you need.
5. Seamless Integration Between ASI and Wiley Metal
Working with both ASI and Wiley Metal allows fire truck manufacturers to consolidate their sourcing and improve build consistency. Instead of working with separate suppliers for bumpers and internal components, OEMs can benefit from the seamless coordination between ASI’s bumper production and Wiley’s fabrication of internal and structural elements.
This integration reduces the friction between vendors, simplifies timelines, and ensures all parts are built to work together. And because both ASI and Wiley operate with the same team, same facility, and same standards, you can count on a consistent experience every step of the way.
6. Experience, Flexibility, and Partnership
Wiley Metal is more than a vendor—we’re a fabrication partner. Our team works closely with your engineers and purchasing teams to evaluate parts, identify opportunities to simplify assembly, reduce costs, or improve fit and function. Whether you need short runs of complex parts, repeat orders for standard SKUs, or help reworking an existing design, we offer the flexibility and problem-solving experience needed to get it done.
Our roots in the Midwest and decades of experience give us a unique perspective on what OEMs need: reliability, precision, and people who know how to get the job done. We’re proud to bring that mindset to every customer relationship.
Partner with Us
Whether you’re building one fire truck or a full fleet, Wiley Metal can help. With 40 years of experience, over 5,000 fabricated components behind us, and a trusted name in fire truck manufacturing, we’re ready to support your next build with quality parts and dependable service.
Contact us today to discuss your fabrication needs or to request a review of your prints. We’re here to help bring your fire truck designs to life.