GrimmSpeed Catback Exhaust System Non-Resonated – 2008-2014 Subaru WRX / STI Hatchback

GrimmSpeed Cat-Back Exhaust System (Non-Resonated) , 2008-2014 Subaru WRX / STI Hatchback

The GrimmSpeed Cat-Back Exhaust System (non-resonated) for the 2008-2014 Subaru WRX / STI Hatchback replaces the factory cat-back section with a mandrel-bent stainless steel system designed to reduce back pressure and improve exhaust flow from the catalytic converter to the tailpipe. GrimmSpeed engineers this system specifically for the Subaru platform’s chassis routing and rear bumper exit geometry.

DETAILS

• Construction: mandrel-bent stainless steel
• Tuning: non-resonated
• Larger diameter than OEM
• Improved flow , reduced back pressure
• Direct bolt-on at factory flange connections
• Fitment: 2008-2014 Subaru WRX / STI Hatchback

Mandrel bending maintains consistent pipe diameter through every bend , crush bending, used in OEM systems, reduces the pipe’s effective diameter at each bend and creates turbulence. GrimmSpeed’s mandrel-bent construction eliminates these restriction points for improved exhaust gas velocity and reduced pumping losses. The non-resonated design uses no internal resonators for a more open, aggressive exhaust tone. Louder and more present than the resonated version , appropriate for builds where maximum sound character is the priority over daily refinement.

The system connects at the factory flange after the catalytic converter and routes to the factory hanger positions , no cutting, no welding, no modification to the underbody is required. The stainless construction is rated for the thermal and road environment of daily-driven performance cars.

What’s in the Box

• GrimmSpeed cat-back exhaust system
• Gaskets
• Hardware
• Installation instructions

Why Choose GrimmSpeed

GrimmSpeed has been engineering performance parts for Subaru platforms from their Portland, Oregon facility since 2003. Everything they make is designed around real-world use , their engineers drive the same cars their customers drive, which means product decisions are made with genuine platform knowledge behind them. GrimmSpeed designs parts in-house, sources quality materials, and validates fitment on the actual application before release. The result is parts that install correctly the first time, perform as advertised, and hold up under the conditions Subaru owners actually subject their cars to. Whether it is a critical engine component or a cosmetic upgrade, the same attention to detail and fit quality applies across the catalog.

The RallySport Take

The GrimmSpeed cat-back is the correct exhaust upgrade for 2008-2014 Subaru WRX / STI Hatchback owners who want improved sound and flow from a quality stainless system with correct Subaru-specific fitment. Fits the 2008-2014 Subaru WRX / STI Hatchback.

Fitment