Frame Head Bottom Plate, for Beetle 66-78

OVERVIEW

When it comes to the structural integrity of your air-cooled classic, the frame head is arguably the most critical component of the entire chassis. Over decades of service, the original bottom plate often falls victim to "frame head rot," caused by trapped moisture, road salt, and debris that accumulates inside the chassis tunnel. This IAP Frame Head Bottom Plate is engineered to provide a factory-correct replacement for 1966 through 1978 Standard Beetles, restoring the rigid foundation necessary for proper front suspension geometry. Whether you are performing a full body-off restoration or repairing a daily driver that has seen better days, this heavy-duty stamped steel plate ensures that your ball-joint front beam has a solid, secure mounting surface that meets original equipment standards.

At Appletree Automotive, we understand that a patch job is never enough when safety is on the line. This replacement plate is designed with the professional builder in mind, featuring the correct contours and pressings to match the 113-701-311B factory specification. Replacing a compromised bottom plate is essential for maintaining the alignment of your Volkswagen, as a weakened frame head can lead to unpredictable handling, uneven tire wear, and even catastrophic failure of the front torsion housing mounts. By choosing this high-quality replacement, you are investing in the longevity of your Beetle, ensuring that the "backbone" of your car remains stiff and true for another fifty years of cruising. Don''t settle for thin, substandard sheet metal when you can install a component that brings back the structural confidence your VW had when it first rolled off the assembly line.

FITMENT

This frame head bottom plate is designed specifically for the following Volkswagen models equipped with a standard ball-joint front end:

• Volkswagen Beetle (Standard): 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978
• Volkswagen Karmann Ghia: 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1974 (Note: Check clearance on specific Ghia pans)
• Note: This part fits Sedan and Convertible models.
• IMPORTANT: This product DOES NOT fit Super Beetle (1302 or 1303) models, as they utilize a completely different strut-style front suspension and frame head design.

SPECS

The following technical specifications ensure this part meets the rigorous demands of your VW restoration project:

• Part Number: 113-701-311B (IAP 95-12-00-4)
• Material: Heavy-gauge stamped cold-rolled steel
• Finish: Protective shipping/weldable primer (Requires preparation before final paint)
• Weight: Approximately 8.2 lbs
• Shipping Dimensions: Precision cut to match the factory lower frame head footprint
• Application: Bottom closure plate for the front chassis frame head
• Compatibility: Designed for Ball-Joint style front ends (1966-later)

PRO TIPS

1. Prioritize Clean Metal and Proper Fitment

Before you even think about striking an arc, you must ensure that every bit of rust is removed from the remaining chassis tunnel and side sections of the frame head. Use a flap disc or wire wheel to take the mating surfaces down to shiny, bare metal. It is highly recommended to use a weld-through primer on the inside of the new bottom plate and the inside of the chassis tunnel before assembly. This provides a layer of zinc protection in an area that you will never be able to access again once the plate is welded shut, effectively preventing the "inside-out" rust that killed the original factory plate.

2. Maintain Suspension Alignment During Welding

The frame head bottom plate acts as a structural tie for the front beam mounting points. To prevent the chassis from warping or pulling out of alignment during the welding process, it is a "best practice" to bolt an old front beam or a dedicated welding jig to the frame head while you are tacking the new plate in place. This ensures that the bolt holes remain perfectly spaced and square. Use a "stitch weld" techniquealternating sides and cornersto manage heat soak. If you dump too much heat into one area at once, you risk distorting the metal, which can make bolting your front suspension back on a nightmare.

3. Seal the Seams for a Lifetime Repair

Once the welding is complete and the metal has cooled, don''t rely on paint alone to protect your work. Use a high-quality automotive-grade seam sealer along all the welded edges where the bottom plate meets the frame head sides and the main floor pan tunnel. This prevents moisture from "wicking" into the microscopic gaps of the weld beads. After the seam sealer has cured, apply a robust undercoating or a chassis-specific epoxy paint. Since the bottom of the frame head is constantly bombarded by road debris, a durable finish is the only way to ensure your hard work isn''t undone by the elements in a few years.