HKS Stainless Steel Front Pipe with High-Flow Catalytic Converter - Subaru Impreza WRX / STI

Name: EJ25 / EJ257 / EJ205 HKS Metal Catalyzer + Downpipe
Brand: HKS
SKU: 33005-AF016
Price: 2783 EUR
Availability: InStock

The HKS Stainless Steel Front Pipe with High-Flow Catalytic Converter is designed for the Subaru Impreza WRX and STI, replacing the restrictive factory front pipe with a high-performance solution that improves exhaust flow, reduces back pressure, and delivers faster turbo response—without compromising emissions performance.

Manufactured from high-quality stainless steel, the front pipe offers outstanding corrosion resistance, excellent heat resistance, and long-lasting durability. The integrated high-flow catalytic converter provides significantly better exhaust flow than the factory unit while maintaining effective emissions control. The result is quicker turbo spool, improved mid-range torque, and sharper throttle response.

This front pipe is an excellent upgrade for both lightly modified and high-performance WRX/STI builds, including vehicles equipped with upgraded turbochargers or ECU tuning. It is fully compatible with both the factory exhaust system and aftermarket cat-back systems, including other HKS exhaust components.

Designed as a direct bolt-on replacement, the system installs using the factory mounting points with no modifications required.

Features

Fits the Subaru Impreza WRX and STI.
HKS Front Pipe with high-flow catalytic converter.
Improved exhaust flow with reduced back pressure.
Faster turbo spool and improved throttle response.
Increased mid-range torque.
Manufactured from high-quality stainless steel.
Integrated high-flow catalytic converter for improved flow while maintaining emissions performance.
Compatible with both factory and aftermarket exhaust systems.
Direct bolt-on installation with OEM-style fitment.

Product video

Technical specification

Article nr:

33005-AF016

Manufacture Partnumber:

33005-AF016

In October 1973, two talented and young engineers had a vision; to design and build high performance engines and components that major OE manufacturers could not, or would not, produce. HKS pioneered the Japanese aftermarket industry by delivering a host of exciting new products, including the first commercially available electronic turbo timer and boost controller. Other early products included piggy-back ECUs and sophisticated fuel management tools. HKS was clearly driving performance trends for Japanese vehicles forward!

Today, HKS is one of the world's most well-known brands and the obvious choice for you who builds a JDM car. In the assortment you will find everything from chassis products to exhaust systems and turbo kits. HKS is behind some of the coolest builds and professional drivers in the world, so when you choose HKS, you choose the best.