SKU: HS15STIGM4ST
Invidia 2015+ Subaru WRX / STI Gemini/R400 Single Layer Quad Titanium Tip Cat-Back Exhaust
The Invidia Gemini R400 Single Layer Quad Titanium Tip Cat-Back Exhaust (HS15STIGM4ST) is precision-engineered for 2015–2021 Subaru WRX and STI sedan models, offering superior performance gains, a rich deep sporty exhaust note, and premium styling.
Constructed from mandrel-bent SUS304 polished stainless steel piping with minimal bends and larger diameter for optimal flow, it features Advantex muffler technology for drone-free sound, flat-bottom aerodynamic design, and single-layer rolled titanium quad tips (4.5-inch diameter) with robot TIG welding for exceptional durability and a high-end burnt titanium finish.
Key Features
- SUS304 Stainless Steel Piping: Mandrel-bent with larger diameter and minimal bends for unrestricted exhaust flow and significant HP/torque increases.
- Advantex Muffler Technology: Continuous internal piping and acoustic dampening for a refined, deep boxer rumble without cabin drone.
- Single Layer Quad Titanium Tips: Rolled 4.5-inch burnt titanium tips for heat resistance, aggressive aesthetics, and lightweight performance.
- Aerodynamic Flat-Bottom Muffler: Enhances high-speed stability, reduces weight, and promotes efficient exhaust evacuation.
- OEM-Compatible Fit: Direct bolt-on installation using factory hangers and flanges (new gaskets and hardware included).
Product Notes
- Delivers measurable horsepower and torque gains while enhancing throttle response and remaining emissions-compliant.
- Balances aggressive sound for track use with refined tone for daily driving – fills the gap between Q300 and N1 systems.
- Titanium tips provide a unique burnt finish that resists discoloration and complements Subaru’s sporty look.
Warranty: Lifetime limited against manufacturing defects.
Installation Notes
- Professional installation recommended for optimal alignment and torque specifications.
- Bolt-on design no cutting or welding required uses OEM mounting points.
- May require adapter for certain downpipes inspect clearance with aftermarket suspension.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015–2021 | Subaru | WRX | Sedan (Base, Premium, Limited) |
| 2015–2021 | Subaru | WRX STI | Sedan (Base, Limited) |
Why Choose Invidia Gemini R400?
- Race-proven design from a leader in Subaru performance exhausts, offering the perfect balance of power, sound, and style.
- Superior craftsmanship with CNC flanges, robot TIG welding, and premium materials for long-term reliability.
- Engineered to enhance the natural Subaru boxer engine tone while providing noticeable performance upgrades.
Frequently Asked Questions
- Q: Will this fit my 2020 STI Limited sedan?
A: Yes, fully compatible with all 2015–2021 WRX and STI sedan models, including Limited trims. - Q: How does the R400 sound compared to the Q300?
A: The R400 delivers a deeper, more aggressive tone with greater volume than the Q300, but still refined for street use. - Q: Does it require a downpipe or tune?
A: No tune needed standalone, but pairs excellently with Invidia downpipes for maximum power gains.
Shipping & Handling
- Method: Ground freight delivery only.
- Availability: Usually ships within 1-2 business days.
- Packaging: Securely crated with protective foam for maximum transit protection.
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