The Subaru BRZ, Scion FR-S, Toyota 86 and GR86 share their exhaust layout: headers from the boxer engine, an over-pipe and front pipe with catalytic converters, and a cat-back with dual exits. A cat-back changes sound and saves some weight, while header changes on the first-generation FA20 cars are known for addressing the torque dip in the mid-range. Second-generation cars with the larger FA24 already make more mid-range torque.
BRZ and GR86 exhaust layout
| Section | Notes |
|---|---|
| Headers | Collect exhaust from the flat-four; header design shapes the torque curve |
| Over-pipe and front pipe | Connect headers to the rest of the system; catalytic converters live here |
| Cat-back | Pipes, muffler and dual tips after the converters |
The FA20 torque dip
First-generation cars (about 2013 to 2020) with the FA20 are known for a dip in torque in the middle of the rev range. Aftermarket headers and engine calibration are commonly used to smooth it. A cat-back alone does not change it much; see FA20 vs FA24.
BRZ exhaust upgrades
- Cat-back: sound, weight and appearance; the simplest upgrade.
- Headers: the biggest change in power delivery on FA20 cars, together with calibration; check emissions rules for your state.
- Touring vs track: track versions are louder; touring versions reduce highway drone; see exhaust drone.
Weight savings
Aftermarket cat-backs are often lighter than the factory system, which helps a lightweight car like the BRZ and GR86. Titanium systems save the most; see titanium vs stainless exhaust.
BRZ exhaust sound
The flat-four has a distinctive note, and cat-backs mainly change volume and tone. Check sound clips from the maker and consider how much time you spend on the highway.
Installing a cat-back
Cat-backs bolt to the existing flange behind the catalytic converters and hang from the factory rubber hangers. With the car safely on ramps or jack stands, soak the old bolts with penetrating oil, support the old system as you unbolt it, fit new gaskets, hang the new system loosely, align the tips evenly in the bumper cutouts and then tighten everything. Recheck clamps and hangers after the first drive, because systems settle as they heat up.
Fitment across generations
Cat-backs often fit both generations, but check the year range in each listing; ours state their fitment clearly.
BRZ, 86 and GR86 cat-backs we carry
- AWE Track Edition (13-24 BRZ, 17-21 86, 22-24 GR86): $1,095.00
- AWE Touring Edition (13-25 BRZ, 17-21 86, 22-25 GR86): $1,395.00
See Subaru BRZ and Toyota GR86 parts, GR86 vs BRZ, does exhaust add horsepower?, and our FA20 and FA24 short blocks.
More guides: resonator vs muffler · AWE Track vs Touring.
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