HKS STI Stainless Steel Exhaust Manifold 1419-RF001

HKS STI Stainless Steel Exhaust Manifold is a high-performance, unequal-length stainless steel exhaust manifold designed for the 2002-2014 Subaru WRX and 2004+ STI models. It replaces the factory manifold to optimize exhaust flow, reduce turbo lag, improve throttle response, and increase horsepower and torque while producing the classic Subaru boxer rumble.

Key Features and Specifications:

• Material: Durable SUS304 stainless steel with high-quality welds for corrosion and heat resistance.
• Design: Unequal length piping designed for improved turbo spool and performance.
• Compatibility: Fits 2006-2014 WRX and 2004-2021+ STI with EJ-series engines.
• Installation: Direct replacement for the factory unit; works with stock or aftermarket 2-bolt flange up-pipes.
• Components: Usually includes gaskets, heat wrap, and necessary hardware for installation.
• Reduced Turbo Lag: Smoother, larger-diameter piping improves exhaust gas flow to the turbine.
• Increased Power: Noticeable improvements in both horsepower and torque.
• Signature Sound: Delivers an aggressive, deeper exhaust note.

May require slight modifications to fit older, non-USDM, or modified models (e.g., radiator clearance).

MPN: 1419-RF001