Invidia 2015+ Subaru WRX / STI Gemini/R400 Single Layer Quad Black Tip Cat-Back Exhaust

The Invidia Gemini R400 is not just an exhaust—it’s a statement of refined aggression. Designed for drivers who demand both premium aesthetics and performance in one package, the Gemini R400 catback delivers a signature sound and sharp visual presence that sets it apart from anything else in the segment. Whether you're building a street-sleeper or a show-ready weekend warrior, this system checks every box.

The R400’s layout features quad stainless steel or titanium tips (model dependent) exiting through a sleek rear section—a design nod typically reserved for high-end European and Japanese sports cars. Crafted from fully mandrel-bent SUS304 stainless steel, each system is robotically TIG-welded for precision and strength. The carefully engineered multi-pass straight-through muffler design maximizes exhaust velocity while controlling backpressure, resulting in strong mid-to-top end power gains without sacrificing drivability.

But what truly sets the R400 apart is the acoustic engineering. The Gemini mufflers utilize a multi-chamber internal structure that produces a deep, muscular tone under throttle, while minimizing drone inside the cabin. It’s loud enough to make its presence known under load, yet tame enough to live with daily. If the Invidia N1 is pure aggression, the R400 is high-performance maturity.

• Quad center-exit stainless steel tips offer a unique, race-inspired look
• Mandrel-bent SUS304 stainless steel ensures smooth flow and high durability
• Multi-pass straight-through muffler design balances power and refinement
• Deep, throaty exhaust note with minimal cabin drone
• Ideal for daily-driven performance cars that want both sound and style
• Louder volume than the Invidia Q300, toned down versus the Invidia N1