NOTE Requires the Rear Seat Cupholder base — the cupholder unit provides the lower mount this armrest bolts onto, so it must be installed FIRST (sold separately here)
Comfortable center armrest — adds a natural resting surface the Grenadier doesn't come with
Reduces fatigue — a natural resting position for your arm on long highway miles and rough trails alike
Purpose-built for the Grenadier — engineered for a factory-style fit and easy install onto the cupholder base
Rugged, utilitarian build — premium materials that match the Grenadier's tough interior
Made in the USA — precision-built for strength and long-lasting performance
Diabolical Inc Rear Seat Armrest for the INEOS Grenadier
The comfortable center armrest the factory left out — mounts onto the Diabolical Inc Rear Seat Cupholder base for a clean, integrated finish.
⚠️ Required: Rear Seat Cupholder Base
This armrest does not install on its own — it mounts onto the Diabolical Inc Grenadier Rear Seat Cupholders, which provide the lower mounting point. If you don't already have the cupholder base installed, you'll need it too. Add both to your cart for the complete setup.
Comfort the Factory Left Out
The INEOS Grenadier is built for adventure, but a comfortable center armrest isn't part of the package. This Diabolical Inc armrest fixes that — a natural resting surface that takes the strain off your arm on long drives and rugged trails.
It mounts cleanly onto the Rear Seat Cupholder base, giving you a finished, integrated console feel instead of a bare gap between the seats.
Built to Match the Grenadier
Made from premium materials chosen to hold up to real use, this armrest carries the same tough, utilitarian character as the rest of the Grenadier's cabin — no cheap plastic that looks out of place.
Engineered specifically for the INEOS Grenadier, it installs easily onto the cupholder base and looks like it came from the factory. Precision-built and made in the USA for strength and long-lasting performance.
✅ Why Add the Armrest?
Once the cupholder base is in, the armrest completes the console — a sturdy, comfortable resting surface that makes every highway commute and backcountry trail easier on your arm. Together they turn the Grenadier's empty rear-seat gap into a finished, functional center console.
See It Installed
Watch the Diabolical Inc armrest and cupholder go into the Grenadier. The armrest mounts onto the cupholder base for a factory-style fit, so installation is straightforward and the finished result looks like it belongs.
What vehicle does this fit? Engineered specifically for the INEOS Grenadier for a factory-style fit.
Do I need anything else to install it? Yes — the armrest mounts onto the Diabolical Inc Rear Seat Cupholders, which provide the lower mount. You'll need that base installed first (sold separately).
Is it hard to install? No — once the cupholder base is in place, the armrest bolts on easily with a factory-style appearance. See the install video above.
Where is it made? Precision-built in the USA from premium materials for long-lasting durability.
