Front Undertray. Porsche 964 C4 / 993 C4  ❭  96450412700

Undertray Repair Support Kit – Strong, Cost-Effective Undertray Fix

Has your Porsche belly pan or bottom plate developed broken or cracked mounting supports? This is a common issue we regularly see in our Design911 workshop. Over time, road debris, speed bumps, improper jacking, and general wear can cause the original undertray mounting points to snap or weaken.

Fits:

• Porsche 928 S4 5.0L 1987-92
• Porsche 928 GT 5.0L 1989-91
• Porsche 928 GTS 5.4L 1992-95

Repair kit for diagram ref no 27

Instead of replacing the entire belly pan – which can be expensive – our heavy-duty Porsche belly pan repair support kit provides a simple, strong and long-lasting solution.

What These Repair Supports Do

The original plastic mounting tabs on Porsche undertrays are prone to failure. When they break, the belly pan can sag, vibrate, or become loose, affecting:

• Underbody protection
• Aerodynamics
• Cooling airflow management
• Overall vehicle stability at speed

Our 3D laser-printed nylon repair supports reinforce and replace the failed mounting points. They restore secure attachment of the bottom plate to the chassis, preventing further damage and eliminating rattles or movement.

Why Upgrade to This Repair Kit?

Cost Saving Alternative
A brand-new Porsche belly pan or undertray panel can be costly. This repair kit allows you to fix only the damaged support areas instead of replacing the full panel.

Stronger Than Original
Manufactured from high-strength, flexible 3D laser-printed nylon, these brackets are designed to be more durable than the factory mounting tabs. They resist cracking, vibration fatigue, and road impact stress.

Workshop-Proven Solution
Developed after repeatedly seeing broken undertray supports in our own workshop, this kit is a practical, real-world tested fix trusted by Porsche specialists.

Complete Installation Hardware Included
Each set includes 8 nuts, bolts and washers per side, ensuring secure fitment and straightforward installation.

Ideal For:

• Porsche owners with cracked or broken undertray mounts
• Vehicles with sagging belly pans
• Performance or track cars exposed to higher underbody stress
• Preventative upgrades when replacing or servicing the under

Underbody Protective Undertray Panel 

High-quality, precision-fitting underbody protective panel designed for Porsche 928 models up to model year 1986.

This authentic undertray plays a crucial role in protecting the underside of the vehicle while also improving aerodynamic airflow. Often overlooked during maintenance, original panels are frequently missing or damaged due to age or contact with road surfaces.

Fits:

• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86

Diagram ref no 16

Manufactured from powder-coated aluminium, this replacement panel offers excellent durability, corrosion resistance, and long-term protection—making it ideal for restoration or replacement of worn or missing underbody components.

Key Features

• Direct replacement underbody panel
• Suitable for Porsche 928 (up to 1986)
• Precision fit for OEM-style installation
• Powder-coated aluminium construction
• Improves airflow under the vehicle
• Reduces wind noise and turbulence
• Durable and corrosion-resistant

Function and Purpose

This undertray is an essential part of the vehicle’s underbody system.

It helps to:

• Protect critical components from debris and damage
• Improve aerodynamic airflow beneath the car
• Reduce wind noise at speed
• Support overall vehicle efficiency and performance

Why Replace Your Undertray Panel

Underbody panels are often damaged or missing over time.

Common issues include:

• Cracks or deformation from road contact
• Missing panels due to previous repairs
• Increased wind noise
• Reduced aerodynamic efficiency

Replacing the panel restores both protection and original driving characteristics.