HKS Hi-Power Racing Cat-Back Exhaust System - Subaru WRX STI Sedan (2011-2014)

Name: WRX STI 4dr 11-14 HKS Hi-Power Racing Catback
Brand: HKS
SKU: 31008-BF003
Price: 960 EUR
Availability: InStock

The HKS Hi-Power Racing Cat-Back Exhaust System is designed for the 2011–2014 Subaru WRX STI Sedan (GVF), combining high exhaust flow, a sporty exhaust note, and the renowned quality of HKS. Engineered for both stock and modified engines, it offers an excellent balance of performance, durability, and precise fitment.

The straight-through design reduces back pressure and improves exhaust flow, allowing the engine to breathe more efficiently. This promotes improved throttle response, more effective cylinder scavenging, and a broader, more usable powerband while delivering the deep, sporty exhaust note that has become a hallmark of the HKS Hi-Power series.

The rear muffler is manufactured from SUS304 stainless steel, providing outstanding corrosion resistance, long service life, and a premium finish. The exhaust piping is constructed from SUH409 stainless steel, offering excellent heat resistance and durability under demanding driving conditions. A polished exhaust tip completes the system with the signature HKS Hi-Power appearance.

The exhaust system meets the JASMA standard, ensuring a balance between high performance and controlled sound levels. It is supplied complete with gaskets and installation hardware for straightforward installation and is manufactured in Japan to HKS's exacting quality standards.

Features

Fits the 2011–2014 Subaru WRX STI Sedan (GVF).
Complete Hi-Power Racing cat-back exhaust system.
Suitable for both stock and modified engines.
Straight-through design for improved exhaust flow.
Rear muffler manufactured from SUS304 stainless steel.
Exhaust piping constructed from SUH409 stainless steel.
Improved throttle response and a broader, more usable powerband.
Deep, sporty exhaust note.
Polished 120 mm (4.75") exhaust tip.
Main pipe diameter: 85 mm (3.35").
JASMA-approved.
Includes gaskets and installation hardware.
Made in Japan.

Product video

Technical specification

Article nr:

31008-BF003

Manufacture Partnumber:

31008-BF003

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.