Description
REMARK R1-Spec Cat-Back Exhaust for 2015–2021 Subaru WRX/STI. Use a full titanium R1-Spec layout for a single-exit WRX exhaust build.
Titanium is used for the center piping, muffler, and tip, unlike the stainless-mid-pipe/titanium-muffler versions. The 3-inch pipe path and single large outlet provide a direct layout with the selected level of resonator sound control.
The full titanium designation distinguishes this configuration from a stainless steel system fitted with only a titanium rear muffler. Material choice and resonator choice are separate decisions. Select the acoustic layout for the intended use, and compare only verified installed weights when evaluating mass against another complete system.
Technical Specifications
- Manufacturer Part Number: RK-C1076S-01TF
- Application: 2015–2021 Subaru WRX/STI
- Selected Configuration: Single-Exit / Full Titanium
- Piping: Full 3-inch titanium
- Muffler: Titanium R1-Spec canister
- Tip: Single 4.5-inch slant-cut titanium outlet
- Assembly: Three-piece cat-back
- Fabrication: TIG welded
- Mid-Pipe: Non-resonated
Fitment and Installation
Select the VA or VB chassis-specific part number. Resonated and non-resonated center sections are separate configurations. This is a performance-focused R1-Spec system; adding a resonator should not be interpreted as a guarantee of low cold-start volume or no cabin drone.