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The full-titanium Remark R1-Spec cat-back gives the Subaru WRX and WRX STI a single-exit exhaust with titanium piping, muffler and tip. Its mandrel-bent tubing leads to a straight-through rear muffler and large slant-cut outlet. This resonated version is a complete cat-back system, not the R1 option that combines a titanium muffler with stainless-steel piping.
Fitment
| Years | Make | Model |
|---|---|---|
| 2015-2021 | Subaru | WRX |
| 2015-2021 | Subaru | WRX STI |
Specifications
| Manufacturer Part Number | RK-C1076S-01TFC |
|---|---|
| Assembly | Three-piece cat-back |
| Layout | Single exit |
| Pipe Diameter | 3 inches |
| Midpipe Material | Titanium |
| Muffler Material | Titanium |
| Tip Material | Titanium |
| Tip Diameter | 4.5 inches |
| Tip Style | Slant-cut with laser-engraved logo |
| Midpipe Version | Resonated |
| Welding | TIG |
| Manufacturer Listed System Weight | 17 lb, with resonator |
What's Included
Three-piece full-titanium cat-back assembly with resonated midpipe, straight-through muffler and single slant-cut tip. Optional bolt-in silencer sold separately.
Brand Information
R1-Spec is Remark's performance-oriented single-exit exhaust line. This full-titanium construction is distinct from the stainless-steel R1 systems and titanium-muffler-only option.
Related Parts
- Alternative full-titanium R1 midpipe configuration
- Shop Remark exhaust systems
- Compare same-vehicle option: Remark R1-Spec Cat-Back for 2015-2021 Subaru WRX / WRX STI - Titanium Muffler
- Compare same-vehicle option: Remark R1-Spec Cat-Back for 2015-2021 Subaru WRX / WRX STI - Resonated Stainless
Frequently Asked Questions
Is the midpipe titanium too?
Yes. Remark lists titanium for the midpipe, muffler and tip on this full-titanium system.
What changes with the resonated version?
It adds a resonator in the midpipe. Remark recommends that version to reduce the system's overall loudness.
Is the bolt-in silencer included?
No. Remark lists the optional silencer separately.
Installation Instructions
Follow Remark's current instructions for RK-C1076S-01TFC. Verify the vehicle application, assemble the complete system and check clearance and exhaust connections. Do not substitute installation details from the stainless-midpipe R1 version.
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