Fiberglass Inner Fenders (Mild SloshTubz Pair) – 1973-87 GMC Chevy Trucks

1973–1987 Chevy Truck Mild Tubz | Bolt-In Fiberglass Inner Fenders 

The Square Body deserves a Square Body solution. The 1973–1987 Chevy Truck Mild Tubz are purpose-built for static dropped and mild air bagged Square Body builds — delivering a clean, bolt-in inner fender upgrade that's designed around the details that matter.

Designed Around Your Factory Components

No hacking your A/C system. No rerouting factory components. The passenger side tub is specifically molded to clear all factory air conditioning right out of the box — because a good inner fender should work with your truck, not against it.

Bolt-In Installation — Just Like the Originals

These Tubz install using the same mounting locations as your factory inner fenders. A small amount of trimming to the inner fender brace is required, but everything you need to get it done right is included:

• ✅ Trim template included — no guesswork on where to cut
• ✅ Step-by-step directions included — for a clean, confident install
• ✅ Install video available — see a real-world Square Body Mild Tubz install before you start

Battery Relocation — What You Need to Know

• 1973–1980 models: The factory battery tray will need the downward support trimmed to clear the Tubz and raised approximately 1 inch — simply redrill the holes 1 inch higher and add nutserts to the new holes
• 1981–1987 models: If you want to keep your battery under the hood, you'll need to add our battery relocation bracket — available in both driver and passenger side configurations. It replicates the factory 73–80 battery positioning for a clean, familiar look

Premium Fiberglass Quality

Built from the same heavy duty fiberglass used across our entire Tubz lineup — smooth, strong, and needing very little prep work before paint.

Please note: These Tubz are shipped and handled multiple times before delivery. Minor imperfections such as small scratches or chips can occasionally occur in transit. You are still receiving one of the nicest fiberglass products available anywhere.

What's Included:

• ✅ 73–87 Chevy Truck Mild Tubz (pair)
• ✅ Trim template
• ✅ Installation directions