---
product_id: 766007478
title: "90mm (3.5\") to 51mm (2\") Straight Reducer Hose Coupler Intercooler Universal Tube Blue"
brand: "ap automotive"
price: "¥10767"
currency: JPY
in_stock: true
reviews_count: 5
category: "Ap Automotive"
url: https://www.desertcart.jp/products/766007478-90mm-3-5-to-51mm-2-straight-reducer-hose-coupler
store_origin: JP
region: Japan
---

# 90mm to 51mm diameter reducer High-temp resistant -60°C to +180°C 4-ply polyester reinforced, 5.5mm thick 90mm (3.5") to 51mm (2") Straight Reducer Hose Coupler Intercooler Universal Tube Blue

**Brand:** ap automotive
**Price:** ¥10767
**Availability:** ✅ In Stock

## Summary

> 🚀 Step down in size, step up in performance!

## Quick Answers

- **What is this?** 90mm (3.5") to 51mm (2") Straight Reducer Hose Coupler Intercooler Universal Tube Blue by ap automotive
- **How much does it cost?** ¥10767 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/766007478-90mm-3-5-to-51mm-2-straight-reducer-hose-coupler)

## Best For

- ap automotive enthusiasts

## Why This Product

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

## Key Features

- • **Flexible Yet Tough:** Silicone’s unmatched flexibility prevents cracking and dry rot, maintaining peak performance over the lifespan of your vehicle.
- • **Reinforced for Reliability:** 4-ply polyester reinforcement and 5.5mm wall thickness deliver superior pressure resistance up to 9 bars—perfect for turbocharged setups.
- • **Precision Fit for Performance:** Seamlessly connect 90mm to 51mm pipes with a universal straight reducer designed for flawless airflow and fluid transfer.
- • **Versatile Universal Compatibility:** Ideal for intercoolers, intake systems, water lines, and more across cars, trucks, and performance vehicles—upgrade your ride with confidence.
- • **Built to Withstand Extreme Conditions:** Engineered silicone tubing resists temperatures from -60°C to +180°C, ensuring durability under the harshest automotive environments.

## Overview

This 90mm to 51mm blue silicone straight reducer hose offers a high-performance, universal fit for automotive applications. With a 127mm length, 5.5mm thick walls, and 4-ply polyester reinforcement, it withstands extreme temperatures (-60°C to +180°C) and pressures up to 9 bars. Perfect for intercoolers, intake, and coolant systems, it ensures durability, flexibility, and reliable airflow in demanding environments.

## Description

Silicone hoses are designed to connect metal pipe work and components in systems using water and ethylene glycol based coolants. Our straight reducers enable you to join 2 outlets of different diameter or to reduce the overall ID of pipe work. Silicone Hose is reinforced with textile layers to be extreme pressure resistant and also to vacuums in your Air Charge System. These Hoses are suitable for your Intercooler system, Intake system, Water lines or similar. Silicone hose is a extremely flexible compared to rubber, with the ability to maintain this flexibility over the lifespan of its use. Under some conditions rubber hoses are at risk of splitting, hardening, or dry rot, which is why silicone hoses are the choice for many trucks, buses, performance cars, and many other vehicle and industrial applications. We increase the number of plys and wall thickness of our straight reducers as the diameter increases, this is because we want all our range capable of carrying fluid and air at very high pressures. So if you’re building a racing vehicle, adding turbochargers or superchargers, our silicone hose is the way to go. Silicone hose is a extremely flexible compared to rubber, with the ability to maintain this flexibility over the lifespan of its use. Under some conditions rubber hoses are at risk of splitting, hardening, or dry rot, which is why silicone hoses are the choice for many trucks, buses, performance cars, and many other vehicle and industrial applications. We increase the number of plys and wall thickness of our 90 degree hoses as the diameter increases, this is because we want all our range capable of carrying fluid and air at very high pressures. So if you’re building a racing vehicle, adding turbochargers or superchargers, our silicone hose is the way to go. Polyester Material suitable for Coolant / Glycol, Water, Steam, Oi Mist, Air, Marine, Automotive

Review: Excellent as described, used to reduce on my defender when using another air box not made for by the vehicle
Review: Used this for my down pipe T into 50mm mini shed guttering as nothing available in the gutter world this site. I would rather this anyhow, easy fit, great quality

## Features

- 90mm (3.5") to 51mm (2") Internal Diameter | Hose Length 127mm (5 Inch)
- High Temperature Resistant Hose -60°C to +180°C
- 5.5mm Wall Thickness Silicone Tubing
- 4 Ply Polyester Reinforcement - Universal Fitment Suitable For Cars, Vehicles, Trucks, Pickups, Automotive
- Straight Reducer Step Down Silicone Hose, suitable for a wide range of applications that require high and low temperature flexibility with excellent resistance to ozone, UV and moisture. Silicone Hose is reinforced with textile layers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BPMH7CJ8 |
| ASIN  | B0BPMH7CJ8 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #19,657 in Automotive ( See Top 100 in Automotive ) #6 in Car Engine Intercooler Parts |
| Color | Blue |
| Customer Reviews | 4.5 4.5 out of 5 stars (65) |
| Customer reviews | 4.5 4.5 out of 5 stars (65) |
| Cutting Diameter | 90.51 Millimeters |
| Date First Available | 18 April 2024 |
| Date First Available  | 18 April 2024 |
| Finish | Glossy |
| Included components | 90mm > 51mm Silicone Reducer Hose Blue, Silicone Hose, Step Down Reduction Pipe |
| Installation Method | Manual |
| Item Package Quantity | 1 |
| Item Weight | 100 g |
| Item diameter | 90.51 Millimeters |
| Item model number | SSR090051B-ASH#1 |
| Item model number  | SSR090051B-ASH#1 |
| Manufacturer | ap automotive |
| Manufacturer  | ap automotive |
| Material | Silicone Rubber |
| Maximum Pressure | 9 Bars |
| Part number | SSR090051B-ASH#1 |
| Pattern | Straight Reducer |
| Product Dimensions  | 12.7 x 12.7 x 12.7 cm; 100 g |
| Shape | Circular |
| Size | 90mm (3.5") to 51mm (2") |
| Specific uses | Cars, Vehicles, Trucks, Pickups, Automotive |
| Specification met | SAEJ20 |
| Style | Silicone Straight Connector |

## Product Details

- **Brand:** AP Automotive
- **Colour:** Blue
- **Item weight:** 100 Grams
- **Material:** Silicone Rubber
- **Maximum pressure:** 9 Bars

## Images

![90mm (3.5") to 51mm (2") Straight Reducer Hose Coupler Intercooler Universal Tube Blue - Image 1](https://m.media-amazon.com/images/I/411eYR4oSbL.jpg)
![90mm (3.5") to 51mm (2") Straight Reducer Hose Coupler Intercooler Universal Tube Blue - Image 2](https://m.media-amazon.com/images/I/51rwj3jDmtL.jpg)
![90mm (3.5") to 51mm (2") Straight Reducer Hose Coupler Intercooler Universal Tube Blue - Image 3](https://m.media-amazon.com/images/I/61IYT1Y4NmL.jpg)
![90mm (3.5") to 51mm (2") Straight Reducer Hose Coupler Intercooler Universal Tube Blue - Image 4](https://m.media-amazon.com/images/I/61v2UdphQEL.jpg)
![90mm (3.5") to 51mm (2") Straight Reducer Hose Coupler Intercooler Universal Tube Blue - Image 5](https://m.media-amazon.com/images/I/71jH+O5vu1L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***Y on 9 November 2025*

Excellent as described, used to reduce on my defender when using another air box not made for by the vehicle

### ⭐⭐⭐⭐⭐ Review
*by T***N on 11 November 2025*

Used this for my down pipe T into 50mm mini shed guttering as nothing available in the gutter world this site. I would rather this anyhow, easy fit, great quality

### ⭐⭐⭐⭐⭐ Review
*by M***M on 5 October 2025*

Great quality, arrived early. Perfect for what was needed

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-26*