Product Description
ATI AUX42CBR9 combines a 42-gallon diesel auxiliary fuel tank with a compact 9" tall crossover toolbox—perfect when you need extra range and secure storage in a short footprint. Built from .125" aluminum and fully baffled, it’s pressure/leak-tested and designed to work with popular gravity-feed auxiliary install kits (e.g., FUEL SHOTZ) for a clean, no-switch integration to the OE tank.
Key Features
- 42-gallon diesel auxiliary capacity with toolbox combo.
- .125" aluminum construction; fully baffled to reduce fuel slosh.
- Automotive-style vented cap; optional lockable cap and gauges available.
- Two 2" NPT bungs for flexible pump/filler placement.
- Includes welded tabs/hold-downs; clean, debris-free interior.
Fitment
Universal pickup-bed fit (full-size trucks typical). Works with auxiliary kit routing fuel through the factory filler so the OE tank stays full until the aux tank is empty. Always verify bed/toolbox clearances before ordering.
Dimensions & Capacity
- Capacity: 42 gallons
- Tank (overall): ~48.5" L × 19" W × 21" H
- Toolbox (lid height 9"): ~42" L × 19" W × 9" H
- Note: Mounting tabs may add ~1.5" per side; account for cap height and bed-rail/toolbox-lid clearance when measuring.
What’s Included
- ATI AUX42CBR9 42-gallon auxiliary tank + 9" toolbox combo
- Welded mounting/hold-down tabs
Auxiliary installation kits, gauges, pumps, hoses, and lockable cap sold separately.
Compliance
Diesel auxiliary application designed to meet auxiliary tank best practices; use with an appropriate install kit (e.g., FUEL SHOTZ) and follow all federal/state regulations and ATI instructions.
Installation Notes
- Typical install ties the aux tank into the OE filler. The OE gauge stays on FULL until the aux tank empties.
- No in-cab switches required with common gravity-feed kits; rollover protection built into adapter/tank on many kits.
- Verify total width with tabs and vertical clearance with cap/toolbox lid before drilling.
FAQ
- Is the AUX42CBR9 for diesel only?
- Yes—this model is configured for diesel auxiliary use. (ATI offers separate gasoline-aux versions.)
- What are the exact dimensions?
- Plan around ~48.5" (L) × 19" (W) × 21" (H) for the tank, plus a 42" (L) × 19" (W) × 9" (H) toolbox. Allow ~1.5" extra per side for mounting tabs and additional height for the cap.
- Does it include an install kit?
- No. Add a compatible auxiliary install kit (e.g., FUEL SHOTZ) for your truck year/make so the aux tank feeds the OE tank via the filler neck.
- Is the interior baffled?
- Yes. The tank is fully baffled to reduce fuel movement and improve stability.
- Can I add a lockable cap or gauges?
- Yes—ATI offers a vented lockable cap and both tank-mounted and in-cab gauge options.
