---
product_id: 12835260
title: "RDS MFG INC Auxiliary Fuel Tank 37Gal - 71804"
brand: "rds mfg inc"
price: "KD 401.96"
currency: KWD
in_stock: true
reviews_count: 8
category: "Rds Mfg Inc"
url: https://www.desertcart.com.kw/products/12835260-rds-mfg-inc-auxiliary-fuel-tank-37gal-71804
store_origin: KW
region: Kuwait
---

# 37-gallon capacity vehicle-specific fit aluminum construction RDS MFG INC Auxiliary Fuel Tank 37Gal - 71804

**Brand:** rds mfg inc
**Price:** KD 401.96
**Availability:** ✅ In Stock

## Summary

> ⛽ Fuel your freedom with RDS — never stop, never settle!

## Quick Answers

- **What is this?** RDS MFG INC Auxiliary Fuel Tank 37Gal - 71804 by rds mfg inc
- **How much does it cost?** KD 401.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/12835260-rds-mfg-inc-auxiliary-fuel-tank-37gal-71804)

## 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

- • **Premium Aluminum Build:** Lightweight yet durable design resists corrosion and rough road vibrations.
- • **Massive 37-Gallon Capacity:** Extend your range and never worry about running dry on long hauls.
- • **Versatile Fuel Compatibility:** Supports diesel gravity feed and gasoline siphoning with electric pump for ultimate flexibility.
- • **Seamless Vehicle-Specific Fit:** Engineered to integrate perfectly with your car’s fuel system for hassle-free installation.
- • **Smart Dual Feed & Vent System:** All connections on driver’s side for easy monitoring and maintenance.

## Overview

The RDS MFG INC Auxiliary Fuel Tank 37Gal (model 71804) is a robust, aluminum auxiliary fuel tank designed specifically for cars. Offering a generous 37-gallon capacity, it supports diesel gravity feed and gasoline siphoning via electric pump. Its vehicle-specific fit ensures smooth integration, while the dual feed, vent, and drain system on the driver’s side simplifies installation and maintenance. Lightweight yet durable, this tank is built to withstand rough roads and extend your vehicle’s fuel range effortlessly.

## 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: Great product - This product was easy to install. The only thing I did, was to make a couple of 11/2" steel straps with foam rubber underneath the straps, to isolate the tank from vibration .I did this because I didn't feel the hold down tabs were secure enough for rough roads. I also isolated the straps that I bolted down with rubber washers . Otherwise this tank is perfect for my needs. Shipping was prompt and tank was undamaged even though it was only held down by one thin strap to pallet. I would definitely recommend this product.
Review: Nicely constructed but shipping/ packaging could be better - Tank arrived on a small pallet with one strap holding it down. Adequate but I expected more. Top side of tank was not covered or protected but it had no dents or dings and was very shiny. Fuel filler cap was broken into 2 pieces. It will have to be replaced. Since it was not packaged in any way that offered protection to the fuel inlet or cap I'm not surprised with the resulting damage. Fortunately the face of the fuel gauge was not damaged. The lense was unscratched and intact. Welds are minimized by using a bend brake to take one sheet and bending it 3 times to form a casing requiring welds on only one side and each end. Excellent technique Welds were smooth and very well done, professional. Light years above some of the welds I've seen on imported items The unit is NOT a 32 gallon tank. It holds a minimum of 37 gallons. Exterior dimensions are 50X9X20. That totals to 9,000 cubic inches. Since one US gallon is 231 cubic inches then 9,000 / 231 = 38.96 gallons. That figure has to be reduced somewhat because the interior measurements need to be used to determine the true capacity. Needless to say I was pleased to discover that I was getting an extra 5 gallons for free (almost). But if you're near your CGVW then the extra 5 gallons will add another 35+ pounds to your overall total when towing 5th wheels like I do. Last on my list, the mounting tabs were not properly aligned. They did not lay flat. By standing back a few feet it was obvious they were off level by several degrees. Not a problem functionally nor aestheticly as it won't be seen often but something I felt I should mention it. There are 2 feeds, a vent and a drain allowing you several methods to tie into your existing fuel system or create your own. All are on the drivers side to aid in checking for problems I would have given 5 stars but the broken filler cap took the edge off my enthusiasm.

## Features

- RDS offers a full assortment of tanks in various capacities and dimensions to fit your needs
- Gasoline auxiliary fueling is allowed, if siphoned from the top of the tank by using an electric fuel pump
- Product Type - MOTOR ENGINE FUEL TANK
- Item Package Quantity - 1

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001U3RDHE |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #1,054,178 in Automotive ( See Top 100 in Automotive ) #1,116 in Automotive Replacement Fuel Tanks |
| Brand Name | RDS MFG INC |
| Capacity | 37 Gallons |
| Compatible with Vehicle Type | Car |
| Customer Reviews | 4.1 4.1 out of 5 stars (123) |
| Exterior Finish | RDS |
| Fit Type | Vehicle Specific |
| Fuel Type | Diesel |
| Global Trade Identification Number | 00699300718045 |
| Included Components | Fuel, System, Fuel |
| Item Dimensions | 50 x 20 x 9 inches |
| Item Type Name | Auxiliary Fuel Tank |
| Item Weight | 77 Pounds |
| Manufacturer | RDS MFG INC |
| Manufacturer Part Number | 71804 |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Material Type | Aluminum |
| Model Number | 71804 |
| Product Grade | like new |
| UPC | 699300718045 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** RDS MFG INC
- **Exterior Finish:** RDS
- **Item dimensions L x W x H:** 50 x 20 x 9 inches
- **Material:** Aluminum
- **Vehicle Service Type:** Car

## Images

![RDS MFG INC Auxiliary Fuel Tank 37Gal - 71804 - Image 1](https://m.media-amazon.com/images/I/51WhtT5U3LL.jpg)
![RDS MFG INC Auxiliary Fuel Tank 37Gal - 71804 - Image 2](https://m.media-amazon.com/images/I/71cOirqDqYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product
*by C***L on July 26, 2019*

This product was easy to install. The only thing I did, was to make a couple of 11/2" steel straps with foam rubber underneath the straps, to isolate the tank from vibration .I did this because I didn't feel the hold down tabs were secure enough for rough roads. I also isolated the straps that I bolted down with rubber washers . Otherwise this tank is perfect for my needs. Shipping was prompt and tank was undamaged even though it was only held down by one thin strap to pallet. I would definitely recommend this product.

### ⭐⭐⭐⭐ Nicely constructed but shipping/ packaging could be better
*by E***L on November 15, 2013*

Tank arrived on a small pallet with one strap holding it down. Adequate but I expected more. Top side of tank was not covered or protected but it had no dents or dings and was very shiny. Fuel filler cap was broken into 2 pieces. It will have to be replaced. Since it was not packaged in any way that offered protection to the fuel inlet or cap I'm not surprised with the resulting damage. Fortunately the face of the fuel gauge was not damaged. The lense was unscratched and intact. Welds are minimized by using a bend brake to take one sheet and bending it 3 times to form a casing requiring welds on only one side and each end. Excellent technique Welds were smooth and very well done, professional. Light years above some of the welds I've seen on imported items The unit is NOT a 32 gallon tank. It holds a minimum of 37 gallons. Exterior dimensions are 50X9X20. That totals to 9,000 cubic inches. Since one US gallon is 231 cubic inches then 9,000 / 231 = 38.96 gallons. That figure has to be reduced somewhat because the interior measurements need to be used to determine the true capacity. Needless to say I was pleased to discover that I was getting an extra 5 gallons for free (almost). But if you're near your CGVW then the extra 5 gallons will add another 35+ pounds to your overall total when towing 5th wheels like I do. Last on my list, the mounting tabs were not properly aligned. They did not lay flat. By standing back a few feet it was obvious they were off level by several degrees. Not a problem functionally nor aestheticly as it won't be seen often but something I felt I should mention it. There are 2 feeds, a vent and a drain allowing you several methods to tie into your existing fuel system or create your own. All are on the drivers side to aid in checking for problems I would have given 5 stars but the broken filler cap took the edge off my enthusiasm.

### ⭐⭐⭐⭐⭐ 2016 Ram Shortbed 2500
*by D***E on September 19, 2018*

Fit good in my ram 2016 2500 shortbed. I have a tonneau cover. I didnt use RDS gravity feed system- I ordered a Vent Line adapter from ATTA tank and used that with a pump to pump the diesel into my factory tank. The vent line adapter has a return hose connection and this RDS tank has a stand pipe and return port in addition to the tank vent. Worked perfectly. Ran a switch to under the park brake handle to keyed power---ran it off an add a fuse to the cigar lighter fuse in fusebox under hood. installed this to increase my range for traveling with a 33' travel trailer. I didn't drill any holes in my truck for the fuel lines/wiring-I ran through the ports already in the truck. Did drill holes to bolt to truck bed. I bolted the tank to a piece of plywood with mudflap on top and then bolted the plywood to the floor of bed. Mounted the pump in the bed next to the tank . I have a filter base I will install with a diesel fuel water sep that will be mounted under truck,

## Frequently Bought Together

- RDS MFG INC Auxiliary Fuel Tank 37Gal - 71804
- RDS MFG INC 11025 Diesel Install Kit
- Anderson Metals 57001 Brass Hose Fitting, Adapter, 3/8" Barb x 3/8" NPT Male Pipe

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-05-16*