A Refined Boxer Note for The GR86 and BRZ (2nd Gen)
If you love the balance and handling of your GR86 or Gen 2 BRZ but want the exhaust to have a little more voice, the GrimmSpeed Axle Back Exhaust was built for you. It replaces the factory rear muffler section with a precision fit system that adds tasteful volume, remains composed on long drives, and installs with simple hand tools.
What “Axle Back” Means
Axle back refers to the portion of the exhaust that starts just behind the rear axle and ends at the tips. On the GR86 and BRZ, this is the rear muffler section. Swapping to an axle back changes sound and appearance without touching the front pipe, catalytic converters, or mid pipe. You get a clear change in character with straightforward installation and no complexity.
The GrimmSpeed Difference
This system is a direct replacement for the OEM muffler, tuned to add presence without harshness. It is built from welded 304 stainless steel for long term durability. The tubing is mandrel bent with custom geometry to keep flow smooth and fitment tidy beneath the car. At the rear, two 4-inch polished tips finish the look with a clean, factory plus appearance, and a laser etched badge gives a subtle nod to the craftsmanship behind it.
Built to Seal and Stay Sealed
Where this kit meets the OEM mid pipe, you will find a custom die cut graphite compression gasket. It compresses evenly against the stamped steel flange for a reliable seal and simple install. That attention to the specific materials at this joint means less fuss, fewer variables, and a connection you can trust.
Installation and What You Get
Inside the box you will find the complete axle back assembly and the thick graphite compression gasket that mates to the factory mid pipe. Hardware reuse is simple, and the direct bolt on design keeps the process clear and efficient for a weekend project or a quick shop appointment.
What You'll Notice on Day One
You'll hear a deeper, more present tone that complements the boxer character without unwanted harshness. You'll see a tidy, purposeful finish thanks to the polished tips and precise fitment. You'll feel confident knowing the construction uses stainless steel throughout, smooth mandrel bends, and a sealing solution designed for this exact interface.
