High-downforce rear spoilers and wings put immense localized stress on thin racing bodywork. Without proper reinforcement, the mounting bolts can "pull through" fiberglass or aluminum panels, leading to mid-race aero failure. The Longacre 52-23702 Backing Disk is a simple but critical component designed to spread that load across a larger surface area.
Specifically engineered to work with Longacre’s line of spoiler support rods and braces, these disks provide a professional, clean finish while protecting your expensive bodywork. Machined from lightweight aluminum, they offer the necessary rigidity to keep your spoiler stable at high speeds without adding unnecessary weight to the rear of the car. Whether you are building a Dirt Late Model or a Time Attack car, these backing disks are a mandatory detail for a reliable aero setup.
Key Features
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Load-Distribution Design: Dramatically increases the footprint of your mounting hardware, preventing fasteners from tearing through or cracking thin-gauge aluminum and composite body panels.
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Lightweight Aluminum Construction: Offers high-strength reinforcement with minimal weight penalty, ensuring your rear-end weight bias remains optimized.
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Low-Profile "Aero" Finish: The clean, circular design provides a professional "pro-built" look on both the exterior and interior surfaces of your spoiler or deck lid.
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Universal Component Compatibility: While designed for Longacre spoiler supports, these disks function as universal heavy-duty washers for any 1/4" or 3/16" fastener application where panel reinforcement is needed.
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Vibration Resistance: By providing a wider clamping surface, these disks help keep mounting hardware tight and secure, even under the intense harmonics of a racing engine and rough track surfaces.
