Arrowhead has long been a trusted source for custom fiberglass engine cover assembly, delivering high-quality molded solutions to customers across a range of industries. From commercial delivery trucks and municipal transit buses to van conversions and marine vessels, our fiberglass engine covers have been relied upon for their durability, ease of maintenance, and design flexibility.

Over the years, Arrowhead has produced countless custom engine cover assemblies—each one tailored to meet specific form, fit, and function requirements. These parts are ideal for environments where heat, vibration, and external exposure demand materials that are lightweight, corrosion-resistant, and structurally sound. Fiberglass is a preferred material in these applications due to its excellent strength-to-weight ratio, thermal stability, and ability to be molded into complex shapes.

One example of a custom fiberglass engine cover assembly is a large-volume project for a well-known bus manufacturer. Arrowhead supplied approximately 30 units per week to support their ongoing production needs. These fiberglass engine covers were not only molded to tight dimensional tolerances, but also delivered fully finished. Each unit was painted to match OEM specifications and assembled with functional hardware including latches, hinges, aluminum step plates, and integrated sound-deadening insulation for enhanced comfort and noise reduction.

From prototype to production, Arrowhead handled the complete process in-house—including tooling, molding, finishing, and sub-assembly. This level of vertical integration allows us to maintain tight control over quality and timelines, which is critical for OEMs working on high-volume or deadline-sensitive programs.

Whether you need a one-off prototype or a full-scale production run, Arrowhead has the experience and capabilities to deliver a complete custom fiberglass engine cover assembly built to your exact specifications.

The open molded fiberglass hood is a popular solution for large, contoured components in the transportation industry—especially in applications like buses, trucks, and specialty vehicles. One of the key reasons fiberglass is the preferred material is the significantly lower tooling cost compared to other molding processes. This is especially important for large parts that feature compound curves, complex surfaces, or molded-in details. Open molding allows manufacturers to produce durable, cost-effective hoods without investing in expensive, multi-cavity tooling systems.

An additional benefit of using an open molded fiberglass hood is the material flexibility it offers. The type and quality of fiberglass reinforcement—such as chopped strand mat, woven roving, or multi-axial fabrics—can be selected based on the strength, weight, and cost requirements of the project. This customization enables design engineers to fine-tune performance characteristics, ensuring long-term durability with minimal added weight. This is particularly advantageous in industries where reducing vehicle weight can lead to increased fuel efficiency and improved overall performance.

The open molding process also provides flexibility in integrating functional features into the hood. Structural brackets, reinforcing ribs, hinge mounts, and other hardware can be mechanically fastened, laminated in place, or bonded to the backside of the part during or after the molding process. These additions enhance both the strength and usability of the hood, allowing for seamless assembly with surrounding vehicle components.

Arrowhead specializes in producing high-quality open molded fiberglass hoods and similar components, offering engineering support, in-house tooling, and precision manufacturing to meet your unique project requirements. Whether you need a single custom prototype or a low-to-medium production run, open molded fiberglass offers the versatility, cost savings, and performance you’re looking for.

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