--- product_id: 174477715 title: "70387 Auxiliary Fuel Tank 40 Gal" brand: "rds mfg inc" price: "8450.43 DT" currency: TND in_stock: true reviews_count: 8 category: "Rds Mfg Inc" url: https://www.desertcart.tn/products/174477715-70387-auxiliary-fuel-tank-40-gal store_origin: TN region: Tunisia --- # 40 Gal capacity Alloy steel durable build Made in USA quality 70387 Auxiliary Fuel Tank 40 Gal **Brand:** rds mfg inc **Price:** 8450.43 DT **Availability:** ✅ In Stock ## Summary > ⛽ Fuel your freedom with unmatched capacity and durability! ## Quick Answers - **What is this?** 70387 Auxiliary Fuel Tank 40 Gal by rds mfg inc - **How much does it cost?** 8450.43 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/174477715-70387-auxiliary-fuel-tank-40-gal) ## Best For - rds mfg inc enthusiasts ## Why This Product - Trusted rds mfg inc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Vehicle-Specific Fit:** Precision engineered for seamless truck integration. - • **Proudly Made in the USA:** Quality craftsmanship you can trust and flaunt. - • **Gravity Feed Diesel System:** Effortless, reliable fuel transfer without pumps. - • **Massive 40-Gallon Capacity:** Extend your range and never stop for fuel. - • **Rugged Alloy Steel Construction:** Built tough to withstand the harshest conditions. ## Overview The RDS MFG INC 70387 Auxiliary Fuel Tank offers a robust 40-gallon capacity in a durable alloy steel design, engineered specifically for trucks. Featuring a gravity feed diesel system for easy fueling, this American-made tank ensures reliable performance and seamless integration, perfect for professionals who demand extended range and rugged dependability. ## Description Most RDS transfer tanks also provide auxiliary fueling. RDS offers a full assortment of tanks in various capacities and dimensions to fit your needs. Auxiliary tanks connect to your vehicle’s fuel tank. Diesel fuel can “gravity feed” from the bottom of your RDS tank. An optional Diesel Install Kit contains the necessary items to economically and easily connect your RDS tank to your OEM fuel tank. Gasoline auxiliary fueling is allowed, if siphoned from the top of the tank by using an electric fuel pump. Review: High quality diesel aux. tank - This tank will not fit in a 2009 or 2017 short bed ram truck. I had to do some hefty wheel well modifications which is what I was trying to avoid. It was my fault for ordering before getting the proper measurements from the tank manufacturing company. The quality of this tank is excellent. After modifications and installing the gravity feed diesel transfer kit I filled it up and it worked great. Very high quality build with some great welds. Review: Nice tank - Well built,easy installation. As others have stated it only holds 40 gallons. Not a problem for me but if you need the higher capacity you may want to go a size up ## Features - Product Type :Auto Accessory - Package Dimensions :22.86 Cm L X50.8 Cm W X152.4 Cm H - Country Of Origin :United States - Package Weight :84.0Lbs ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07GNJR7GB | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #312,534 in Automotive ( See Top 100 in Automotive ) #186 in Automotive Replacement Fuel Tanks | | Brand | RDS MFG INC | | Brand Name | RDS MFG INC | | Capacity | 40 Gallons | | Compatible with Vehicle Type | Truck | | Customer Reviews | 4.3 out of 5 stars 31 Reviews | | Exterior Finish | Machined | | Fit Type | Vehicle Specific | | Fuel Type | Diesel | | Global Trade Identification Number | 00699300703874 | | Included Components | Fuel, System, Fuel | | Item Dimensions | 60 x 20 x 9 inches | | Item Type Name | Auxiliary Fuel Tank 40 Gal | | Item Weight | 84 Pounds | | Item dimensions L x W x H | 60 x 20 x 9 inches | | Manufacturer | RDS MFG INC | | Manufacturer Part Number | 70387 | | Manufacturer Warranty Description | Manufacturer Warranty | | Material | Alloy Steel | | Material Type | Alloy Steel | | Model Number | 70387 | | Product Grade | like new | | UPC | 699300703874 | | Unit Count | 1.0 Count | | Vehicle Service Type | Truck | ## Product Details - **Brand:** RDS MFG INC - **Exterior Finish:** Machined - **Item dimensions L x W x H:** 60 x 20 x 9 inches - **Material:** Alloy Steel - **Vehicle Service Type:** Truck ## Images ![70387 Auxiliary Fuel Tank 40 Gal - Image 1](https://m.media-amazon.com/images/I/41TjJ757gVL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ High quality diesel aux. tank *by J***E on October 25, 2020* This tank will not fit in a 2009 or 2017 short bed ram truck. I had to do some hefty wheel well modifications which is what I was trying to avoid. It was my fault for ordering before getting the proper measurements from the tank manufacturing company. The quality of this tank is excellent. After modifications and installing the gravity feed diesel transfer kit I filled it up and it worked great. Very high quality build with some great welds. ### ⭐⭐⭐⭐⭐ Nice tank *by A***S on November 2, 2022* Well built,easy installation. As others have stated it only holds 40 gallons. Not a problem for me but if you need the higher capacity you may want to go a size up ### ⭐⭐⭐⭐ Good tank but filler location could be better *by A***A on December 9, 2025* The tank itself is not bad and works well, but I expected the diesel fill location (the filler neck) to be positioned differently. It’s a bit inconvenient the way it’s placed. Overall, still a decent tank, just not exactly what I imagined. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/174477715-70387-auxiliary-fuel-tank-40-gal](https://www.desertcart.tn/products/174477715-70387-auxiliary-fuel-tank-40-gal) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-07*