---
product_id: 649285598
title: "JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe"
brand: "jnnj"
price: "€ 28.04"
currency: EUR
in_stock: true
reviews_count: 9
category: "Jnnj"
url: https://www.desertcart.sk/products/649285598-jnnj-4-pieces-fuel-injector-return-connector-common-rail-diesel
store_origin: SK
region: Slovakia
---

# Leak-proof tight sealing ring Dual-shape 2-way & 3-way connectors Durable high-grade plastic build JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe

**Brand:** jnnj
**Price:** € 28.04
**Availability:** ✅ In Stock

## Summary

> ⛽ Upgrade your fuel game with leak-proof precision!

## Quick Answers

- **What is this?** JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe by jnnj
- **How much does it cost?** € 28.04 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/649285598-jnnj-4-pieces-fuel-injector-return-connector-common-rail-diesel)

## Best For

- jnnj enthusiasts

## Why This Product

- Trusted jnnj brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Leak-Free Confidence:** Equipped with premium sealing rings ensuring zero fuel leakage and smooth injector flow.
- • **Versatile Connector Duo:** Includes both 2-way L-shape and 3-way T-shape fittings to fit diverse fuel return line setups effortlessly.
- • **Plug & Play Installation:** No cutting or drilling needed—quickly connect compatible hoses for fast, hassle-free upgrades.
- • **All-in-One Fuel Line Solution:** Set of 4 connectors perfect for diesel, air, water, gas, and oil lines across vehicles, boats, and machinery.
- • **Built to Last, Ready to Perform:** Crafted from corrosion-resistant, high-temp plastic for long-term durability and weather resilience.

## Overview

The JNNJ 4 Pieces Fuel Injector Return Connector set features durable, chemical-resistant plastic fittings designed for diesel common rail systems. With tight sealing rings and two connector shapes (2-way and 3-way), these lightweight, easy-to-install connectors ensure leak-free fuel return line connections compatible with various fluids and vehicles.

## Description

Specification: - Product name: Injector return port - Product colour: Black - Product material: Plastic - Product dimensions: 24.4*4.85*5.5mm(2-way), 37.15*4.85*5.5mm(3-way) - Product weight: 0.5kg/set - Type of application: Automotive fuel injectors - Product includes: 1*Plastic 2-way + 3*plastic 3-way Features: - High quality material, sturdy structure, corrosion resistance, high temperature resistance, lightweight and durable. - Durable design, strong and durable, smooth surface and inner wall, can be connected to a variety of pipelines and transported efficiently. - Simple and fast connection for air, water, gas, fuel, oil and inert gas lines. - Widely applicable to trucks, cars, boats, gardens, plumbing, heaters, furnace repairs, etc. - Tight connection with no leakage, can replace old or broken fittings, suitable for most cars.

Review: Good product - Arrived OK thank you
Review: Don't fit... - Part Don't fit. Although it says it do when you put reg and make of vehicle.

## Features

- 【Durable Material】: This injector return port is made of high quality plastic, stable structure, lightweight and strong, sturdy and durable, not easy to deform or break, resistant to chemical corrosion and aging, and adaptable to various weather conditions, can be used for a long time.
- 【Tight Connection】: This injector return fitting is fitted with a piece of strong and durable sealing ring on the connector to make a tight connection, no leakage during use, smooth surface and inner wall for smooth spraying of oil, making it a highly desirable replacement part.
- 【2 Shapes】: The package contains 2 types of injector return connections, 2-way L-shape connector and 3-way T-shape connector, the 2-way connector has a full length of 24.4mm and the 3-way connector has a full length of 37.15mm, both of them have an interface size of 5.5mm and an outlet of 4.85mm.
- 【Easy to Use】: This injector return fitting is easy to install and disassemble: just connect the hoses with the corresponding inner diameters to the fittings, simplifying the installation procedure, no modification, cutting or drilling, safe and tight connection, fast and efficient delivery.
- 【Package Contains】: You will get 1pc 2-way connector and 3pcs 3-way connector, 4pcs in total, widely used to connect all kinds of pneumatic pipes, suitable for hydraulic hoses, air, water, liquid, fuel, oil and gas enough for spare, easily meet your various connection needs.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CSW7C8Z2 |
| Best Sellers Rank | 116,662 in Automotive ( See Top 100 in Automotive ) 103 in Car Petrol Injection Nozzles |
| Brand | JNNJ |
| Connector Type | Compression |
| Country of Origin | China |
| Customer Reviews | 3.8 out of 5 stars 167 Reviews |
| Exterior Finish | Plastic |
| Exterior finish | Plastic |
| Inlet Connection Size | 5.5 Millimeters |
| Inlet Connection Type | Compression |
| Inlet connection size | 5.5 Millimeters |
| Inlet connection type | Compression |
| Manufacturer | JNNJ |
| Material | Plastic |
| Model Number | JNNJ-Port |
| Number of Packs | 4 |
| Number of Pieces | 4 |
| Number of Ports | 5 |
| Outlet Connection Size | 4.85 Millimeters |
| Outlet Connection Type | Compression |
| Outlet connection type | Compression |
| Part Number | JNNJ-Port |
| Set Name | Set of 4 |
| Size | 24.4x4.85x5.5mm/37.15x4.85x5.5mm |
| Specification Met | ISO 9001 |
| Thread Size | 5.5mm |
| Thread Type | Smooth/Compression |
| Unit Count | 1.0 count |
| Valve Type | Fuel Injector Valve |

## Product Details

- **Brand:** JNNJ
- **Exterior finish:** Plastic
- **Inlet connection size:** 4.85 Millimeters
- **Inlet connection type:** Compression
- **Material:** Plastic
- **Number of Packs:** 4
- **Number of ports:** 5
- **Outlet connection size:** 4.85 Millimeters
- **Outlet connection type:** Compression
- **Specification met:** ISO 9001

## Images

![JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe - Image 1](https://m.media-amazon.com/images/I/51kW6h-7PUL.jpg)
![JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe - Image 2](https://m.media-amazon.com/images/I/616xgi7X7kL.jpg)
![JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe - Image 3](https://m.media-amazon.com/images/I/613POirF7eL.jpg)
![JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe - Image 4](https://m.media-amazon.com/images/I/71RBhRrqnKL.jpg)
![JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe - Image 5](https://m.media-amazon.com/images/I/513J7IkNb+L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by R***N on 16 August 2025*

Arrived OK thank you

### ⭐ Don't fit...
*by P***G on 4 March 2025*

Part Don't fit. Although it says it do when you put reg and make of vehicle.

### ⭐⭐⭐⭐⭐ Dose what it's supposed to
*by S***S on 6 April 2025*

Fits perfectly

## Frequently Bought Together

- JNNJ 4 Pieces Fuel Injector Return Connector, Common Rail Diesel Injector Leak Off Pipe Return Connectors, Fuel Return Line Injector Connector Fits for Diesel, for Air Water Gas Fuel Oil Pipe
- Autobar DL01 Diesel Leak Off Kit 1m Garage Workshop Replacement Spare Part, Black

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-08-26*