Quick answer
The REMARK Muffler Axleback for the 2022+ WRX VB offers a controlled, daily-friendly rumble, while the 4" Axleback for the VA WRX/STI delivers a bolder, more aggressive note. Choose based on your generation and desired loudness.
Sound character: Muffled vs. aggressive
The VB chassis WRX uses a 2.4L FA24F engine that, from the factory, sounds more muted than earlier models. The REMARK Muffler Axleback is tuned to reintroduce the classic Subaru rumble without overwhelming noise levels. It's a moderate upgrade that won't upset neighbors.
In contrast, the 4" Axleback for the VA WRX/STI (2015-2021) is styled for those who want a more aggressive appearance and sound. Its larger 4-inch tips and straight-through design produce a louder, more pronounced exhaust note.
Fitment is not interchangeable
These axlebacks are not cross-compatible. The VB axleback fits only 2022+ WRX models, while the VA version fits 2015-2021 WRX/STI. In addition, the 4" VA axleback does not work with the OEM Factory SPT Midpipe, which is a critical installation constraint for VA owners.
Trade-offs at a glance
- Sound volume: VB Muffler Axleback: controlled, neighbor-friendly rumble. 4" VA Axleback: louder, more aggressive note. Consider your noise tolerance and living situation.
- Chassis compatibility: VB axleback is strictly for 2022+ WRX. VA axleback is for 2015-2021 WRX/STI and incompatible with SPT midpipe. Verify your vehicle generation and existing midpipe before ordering.
- Installation complexity: Both are bolt-on replacements for factory mufflers or axleback sections, requiring basic hand tools and a jack.
Product details
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Axleback (Muffler Ver.) - Subaru WRX VB [2022+]: REMARK Muffler Axleback for the 2022+ WRX VB is a simple bolt-on replacement for the factory muffler canisters, restoring the signature Subaru rumble to the otherwise muted FA24F engine. If you daily drive your VB and want a richer exhaust note without excessive volume, this axleback balances sound and civility.
Axleback (Muffler Ver.) - Subaru WRX VB [2022+]
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Axleback (4") - Subaru WRX/STI VA [2015-2021]: The 4" Axleback for the VA WRX/STI features aggressive styling and a larger tip diameter, but does not work with OEM Factory SPT Midpipe and is not interchangeable with the Sports Touring Catback. VA owners seeking a more aggressive look and louder exhaust should confirm their current midpipe setup before purchasing.
Axleback (4") - Subaru WRX/STI VA [2015-2021]
Which one fits you?
Best for
- Owners of 2022+ WRX VB wanting a refined daily exhaust upgrade (choose the Muffler Axleback)
- Owners of 2015-2021 WRX/STI VA seeking a louder, more aggressive axleback with 4" tips (choose the 4" Axleback)
Not for
- VB WRX owners wanting a very loud exhaust (consider a catback option)
- VA WRX/STI owners with an OEM Factory SPT Midpipe or those wanting a quieter exhaust note