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The Remark BOSO Edition axle-back gives the 2015-2021 Subaru WRX and WRX STI an aggressive exhaust note with extended, slant-cut outlets. This version uses burnt-blue single-wall tips and replaces the rear exhaust sections while retaining a compatible midpipe.
Key Features
Fitment
| Years | Make | Model |
|---|---|---|
| 2015-2021 | Subaru | WRX |
| 2015-2021 | Subaru | WRX STI |
Fits the standard factory midpipe or compatible Remark midpipe. Does not fit the factory SPT midpipe or Remark Sports Touring cat-back components. Other aftermarket connections are not supported.
Specifications
| Manufacturer Part Number | RO-TBVA-SL |
|---|---|
| Configuration | Two-piece axle-back |
| Piping | 2.5-inch, 16-gauge T304 stainless steel |
| Tips | Four 3.5-inch slant-style outlets |
| Tip Finish | Burnt blue |
| Tip Wall | Single-wall |
What's Included
Left and right BOSO axle-back sections with four tips total.
Brand Information
Remark manufactures vehicle-specific exhaust systems and matching components, including axle-backs, midpipes and complete cat-backs.
Related Parts
Frequently Asked Questions
Will it fit a factory SPT exhaust?
No. The BOSO version uses the standard midpipe connection, not the SPT connection.
Is this a quiet exhaust option?
No. Remark describes BOSO as a loud, aggressive-sounding exhaust.
Installation Instructions
Use the BOSO axle-back installation instructions for the 2015-2021 WRX and WRX STI. Verify the midpipe connection, position both rear sections and align the outlets before final tightening.
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