HKS SUH409 Equal Length EJ25 Turbo Exhaust Manifold | Impreza WRX STI (08-21) (14019-AF002)
HKS SUH409 Equal Length EJ25 Turbo Exhaust Manifold | Impreza WRX STI (08-21) (14019-AF002)
SKU:14019-AF002
In stock
Couldn't load pickup availability
The HKS SUH409 Equal Length EJ25 Turbo Exhaust Manifold is a high-performance header designed specifically for the Subaru EJ25 engine. Crafted to replace the OEM exhaust manifold, this HKS model features a 4-1 equal length design that enhances exhaust flow efficiency. The improved flow results in better turbo spool, increased low and high-end power, and overall engine responsiveness. Constructed with precision to optimize performance, this exhaust manifold is ideal for enthusiasts seeking to maximize their turbocharged Subaru's output without compromising reliability or drivability.
This exhaust manifold fits Subaru Impreza WRX STI models from 2008 to 2021, including the 04-14 and 15+ versions. It is a direct bolt-on replacement for the stock header, requiring no additional modifications for installation. Suitable for street and performance applications, it helps push the power limits of OEM turbo setups or upgraded turbo systems. The kit includes the manifold itself, designed for easy installation and durability under demanding conditions, making it a reliable upgrade for those aiming to improve exhaust flow and engine performance.
Share
Overview
Overview
HKS Equal Length Exhaust Manifold
Part #: 14019-AF002
Overview
The HKS SUH409 Equal Length EJ25 Turbo Exhaust Manifold is a high-performance upgrade designed specifically for Subaru EJ25 engines, including models such as the Impreza WRX STI from 2008 to 2021. Crafted to replace the OEM header, this exhaust manifold features a 4-1 design that enhances exhaust flow, supporting improved spool and overall turbo response. It is ideal for enthusiasts seeking to maximize their vehicle’s performance potential, whether pushing the limits of the stock turbo or optimizing a custom setup. Constructed with precision and quality materials, this manifold helps improve low and high-range power delivery while maintaining OEM-level mid-range performance, making it a versatile upgrade for spirited driving or competitive applications.Key Features
This exhaust manifold is engineered with a focus on durability and performance, featuring:
- High-quality stainless steel construction for corrosion resistance and longevity
- Equal length primary pipes to optimize exhaust scavenging and flow
- Precision-welded flanges for a secure, leak-free connection
- Optimized 4-1 collector design for improved spool and response
- Enhanced exhaust flow supporting better turbo efficiency and power output
- Designed to fit Subaru EJ25 engines, including various Impreza WRX STI models
Construction & Design
The HKS SUH409 features a meticulously crafted stainless steel construction, ensuring strength and resistance to high temperatures and corrosion. The equal length primary pipes are precisely fabricated to promote balanced exhaust flow, reducing backpressure and enhancing turbo spool characteristics. The flanges are machined for a perfect fit, ensuring a reliable seal and ease of installation. The overall design emphasizes durability and performance, making it a reliable upgrade for demanding driving conditions.
Driving Feel & Feedback
Installing this exhaust manifold results in a noticeable improvement in turbo response and spool time, providing a more immediate and responsive driving experience. The optimized flow characteristics contribute to smoother acceleration and a more aggressive exhaust note, enhancing the overall driving engagement without compromising reliability or daily drivability.
Installation & Fitment
Designed as a direct replacement for the OEM header on Subaru EJ25 engines, installation requires standard mechanical skills and basic tools. Proper fitment should be verified against vehicle specifications and the part number to ensure compatibility. The manifold is intended for performance upgrades and may require additional tuning or supporting modifications for optimal results.
What’s Included
The package includes the HKS Equal Length EJ25 Turbo Exhaust Manifold, ready for installation. Hardware and gaskets are not included and should be sourced separately to ensure a proper seal and fitment.
