HKS 4-6mm Reducer Fitting

Part #: 18006-AK016

Overview

The HKS 4-6mm Reducer Fitting is a precision-engineered component designed to facilitate seamless connections between different diameter hoses or piping in your vehicle’s intake, turbo, or exhaust systems. Crafted for automotive enthusiasts and professional tuners alike, this reducer fitting ensures reliable, leak-free performance under demanding conditions. Its durable construction supports optimal airflow management, heat resistance, and long-term durability, making it an essential upgrade for custom piping setups or maintenance tasks that require precise diameter transitions. This fitting helps improve system integrity and supports your vehicle’s performance tuning efforts by maintaining consistent airflow and reducing turbulence at connection points. Whether you're building a custom intake, upgrading your turbo piping, or replacing worn components, this reducer fitting offers a secure, high-quality solution to meet your needs.

Key Features

This reducer fitting combines quality materials and thoughtful design to deliver a dependable connection solution. Key features include:

• High-grade aluminum construction for lightweight strength and corrosion resistance
• Precisely machined to ensure accurate 4mm to 6mm diameter transition
• Designed for easy installation with a snug, leak-proof fit
• Supports high-temperature environments typical of turbo and exhaust systems
• Compatible with a wide range of aftermarket and OEM piping components
• Reinforced bead and smooth internal bore to minimize airflow restriction

Construction & Design

Manufactured from durable aluminum alloy, this reducer fitting features a precision-machined surface finish for optimal sealing and fitment. Its robust design ensures reliable performance even under high-pressure conditions, making it suitable for various automotive applications requiring reliable diameter transitions.

Installation & Fitment

Installation involves simply inserting the fitting into compatible hoses or piping segments and securing with appropriate clamps. Verify fitment and compatibility with your specific piping diameters before installation to ensure optimal performance.

What’s Included

The package includes one HKS 4-6mm reducer fitting, designed to provide a secure and durable connection between 4mm and 6mm diameter hoses or pipes. Additional hardware or accessories are not included.