Mammoth FlexPanel — Openable Side Window Expansion Panel for INEOS Grenadier

Regular price $1,200.00
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INSTALL Lossless / Non-Destructive Installation
WEIGHT 35.3 lbs
SPECIFICATIONS 37.4" x 24.0" x 4.3"
MATERIAL Aluminum Alloy + 304 Stainless Steel Frame
MODEL INEOS Grenadier
DESIGN FEATURE Openable Panel (Cleaning Access / Extra Workspace)
RECOMMENDED USE Window Cleaning, Outdoor Cooking Space, Temporary Item Placement
TESTED Road-Tested Over 12,000 km

A side-window storage panel that doesn't just add space — it opens up, giving you a functional workspace right at the side of your Grenadier when you need it.

Built to take a beating. The main structure is full aluminum, reinforced with a 304 stainless steel mounting frame, delivering serious structural strength for demanding off-road use — no flex, no rattle, no compromise on durability.

Open when you need it. Unlike fixed side panels, the FlexPanel swings open, making it easy to clean mud, dust, and debris off your side windows after a hard day on the trail. Open it up and it doubles as extra usable space — perfect for setting up an outdoor cooking station or temporarily staging gear while you're loading or unloading camp.

Zero compromise install. Fully non-destructive installation, matched to factory mounting points from reverse-engineered vehicle data — no drilling, no cutting, fully reversible.

Proven, not just promised. Road-tested over 12,000 km across real-world off-road conditions, so it's already been through the mud, dust, and vibration before it ever reaches your Grenadier.

Whether you're deep in the backcountry or just back from a weekend trail run, the FlexPanel gives you the strength of a fixed panel with the practicality of one that actually opens.


Order by 2PM to get delivered next working day! We use 24 hours service with carriers in most cases so that you can get your order delivered on time.

There is €4.99 charge for delivery under €50 Orders. Additional charges will be imposed by our couriers for delivery to remote area, a surcharge may be levied to cover carriage to these areas.

Your product is covered by a 12 month Warranty or more if you opted for the extended warranty. Make sure you register your product.