---
product_id: 524952791
title: "ROUSH 421826"
brand: "roush"
price: "R19905"
currency: ZAR
in_stock: false
reviews_count: 5
url: https://www.desertcart.co.za/products/524952791-roush-421826
store_origin: ZA
region: South Africa
---

# Up to +10 HP & +8 lb-ft torque boost Dual CAI system: bolt-on or custom tune 85mm MAF insert, no calibration needed ROUSH 421826

**Brand:** roush
**Price:** R19905
**Availability:** ❌ Out of Stock

## Summary

> 🚀 ROUSH Cold Air Kit: Unleash your Mustang’s hidden horsepower with zero compromises!

## Quick Answers

- **What is this?** ROUSH 421826 by roush
- **How much does it cost?** R19905 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/524952791-roush-421826)

## Best For

- roush enthusiasts

## Why This Product

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

## Key Features

- • **Warranty-Safe Upgrade:** Enhance performance without risking your factory warranty—engineered for seamless integration.
- • **Effortless Installation:** Uses factory mounting points and hardware for a quick, hassle-free upgrade that fits like a glove.
- • **Plug & Play Power Boost:** Straight bolt-on design delivers instant +10 HP and +8 lb-ft torque—no tune required.
- • **Dual Mode Airflow Flexibility:** Switch between 85mm MAF insert for factory calibration or remove for 105mm MAF with custom tune for max gains.
- • **Durable, Maintenance-Free Filter:** Washable dry filter with dual wire mesh layers keeps airflow smooth and filtration reliable—no oiling needed.

## Overview

The ROUSH 421826 Cold Air Kit for 2015-2017 Mustang 5.0L V8 optimizes airflow with a dual CAI system offering an 85mm MAF insert for no-tune installation or a 105mm MAF option for custom tuning. Expect up to 10 horsepower and 8 lb-ft torque gains, durable washable dry filter technology, and a warranty-safe, bolt-on upgrade that enhances throttle response and fuel efficiency while maintaining factory emissions compliance.

## Description

The all-new 2015-2017 Mustang 5.0L ROUSH V8 Cold Air Kit is more efficient air-intake than the standard stock air box. Cold air induction allows for latent potential in power and fuel efficiency that would otherwise be restricted, as well as providing reduced pressure drop. A custom tune is not required as this CAI system was engineered and tested specifically for this application ensuring MAF signal performance matches factory settings. As a straight bolt on, with no tune, it's possible to see gains of 10hp and 8 lb-ft of torque, a noticeable increase. With this kit you can also remove the MAF insert for a 105mm bore MAF and Custom tune your PCM for even more power. Our dry filter is proven to retain its shape under high airflow and is composed of an inner and outer layer of wire mesh for durability and reliable support of filtration media. The filter requires no oiling and is easily washable for re-use. Included in the kit is the air filter with clamp, injection-molded lower air box/tray with installed EPDM foam hood seal, Blow Molded clean air tubes and all required mounting hardware. The kit utilizes all factory emissions and vacuum lines. Factory mounting locations and hardware are utilized to allow for quick and easy installation. PLEASE NOTE: This product does NOT fit ROUSHCHARGED vehicles.

Review: Great part for the car. Easy to install.
Review: Exactly how it was described. Perfect fit no problems

## Features

- No Calibration required (85mm MAF insert).
- Will not void warranty (85mm MAF insert).
- Improved throttle response.
- Two CAI systems in-one; 85mm MAF insert for factory calibration Or no insert for 105mm MAF bore (105mm REQUIRES tune).
- Features ROUSH Logo.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00T37BY6A |
| Brand | Roush |
| Customer Reviews | 4.2 4.2 out of 5 stars (56) |
| Date First Available | 4 Sept. 2015 |
| Exterior | Textured |
| Item Weight | 2.27 kg |
| Item model number | 421826 |
| Manufacturer | Roush Performance |
| Manufacturer part number | 421826 |
| OEM Part Number | 421826 |
| Product Dimensions | 38.1 x 38.1 x 38.1 cm; 2.27 kg |

## Product Details

- **Brand:** Roush
- **Fit type:** Vehicle Specific Fit
- **OEM part number:** 421826
- **Product grade:** Performance Part
- **Shape:** Round

## Images

![ROUSH 421826 - Image 1](https://m.media-amazon.com/images/I/51O58lt2wVL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by W***M on 30 November 2025*

Great part for the car. Easy to install.

### ⭐⭐⭐⭐⭐ Review
*by C***E on 28 February 2020*

Exactly how it was described. Perfect fit no problems

### ⭐⭐⭐⭐⭐ Review
*by J***H on 20 November 2017*

Fits perfectly! Removing the noise tube into the cabin was the toughest thing involved with the installation. To remove the 1 nut on the firewall behind the engine holding the noise tube in place took close to 2 hours of: sweat, pain and a little blood. But was way worth it, for the fit and finish of a pro shop. If you happen to have a small child at home or .... near by... use the child to get to the bolt as the child's arms my actually fit, TOP HINT: remember to use a fender cover so your belt, or small child does not scratch the paint! I found the best way to gain access to the bolt was to squeeze my arm in right near where the oil dip stick is located, using a very small wrench as a socket wrench will not work as the welded bolt is far to long for any socket to fit over.

## Frequently Bought Together

- Roush 2015+ Mustang 5.0L
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**Shop now:** [https://www.desertcart.co.za/products/524952791-roush-421826](https://www.desertcart.co.za/products/524952791-roush-421826)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-21*