HKS 45 mm Up-Pipe - Subaru Impreza WRX GDA/GDB (EJ25, US-Spec)

Name: WRX GDA 02-05 EJ20 Turbo HKS Up-Pipe
Brand: HKS
SKU: 34998-BF001
Price: 307 EUR
Availability: InStock

The HKS 45 mm Up-Pipe is designed for US-spec Subaru Impreza WRX GDA and WRX STI GDB models equipped with the EJ25 engine and a compatible single-scroll turbocharger. Replacing the factory up-pipe between the exhaust manifold and the turbocharger turbine inlet, it provides a smoother exhaust path, improving exhaust flow, turbo response, and overall engine performance.

Featuring a 45 mm pipe diameter, the HKS Up-Pipe is engineered to optimise exhaust gas flow to the turbocharger while reducing exhaust restriction before the turbine. The result is faster turbo spool, improved boost response, and enhanced power delivery, making it an excellent upgrade for both standard vehicles and modified engine builds.

Manufactured from high-quality stainless steel, the HKS Up-Pipe offers outstanding corrosion resistance, excellent heat resistance, and long-lasting durability, even under demanding driving conditions. Its vehicle-specific design ensures direct bolt-on installation with compatible HKS exhaust manifolds and related components, making it suitable for replacement, repair, or performance upgrades.

Features

Fits selected US-spec Subaru Impreza WRX GDA and WRX STI GDB models.
Designed for the EJ25 engine with a compatible single-scroll turbocharger.
HKS 45 mm Up-Pipe.
Improved exhaust flow to the turbocharger.
Reduced exhaust restriction before the turbine.
Faster turbo spool and improved boost response.
45 mm pipe diameter.
Manufactured from high-quality stainless steel.
Direct bolt-on installation with compatible HKS components.
Suitable for replacement, repair, or modified exhaust system installations.

Product video

Technical specification

Article nr:

34998-BF001

Manufacture Partnumber:

34998-BF001

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.