Invidia Gemini/R400 Cat-Back Exhaust - 2011-2014 Subaru WRX/STI Sedan (Quad Titanium Tips)

Transform your WRX or STI sedan with the legendary Invidia Gemini/R400 cat-back exhaust system featuring quad titanium tips. Combining aggressive sound, proven power gains, and stunning aesthetics, this single-layer design delivers the perfect exhaust note for the EJ25 engine. The premium titanium tips and stainless steel construction make this the ultimate exhaust upgrade for your 2011-2014 sedan.

Key Features:

• Quad titanium tips for premium appearance
• Single-layer design for aggressive exhaust note
• Stainless steel construction for durability
• Proven horsepower and torque gains
• Direct bolt-on fitment for WRX/STI sedan
• Aggressive deep tone under acceleration
• Premium Invidia quality and engineering
• Made in Japan

Performance Benefits:

• Proven Power Gains: Increased horsepower and torque throughout RPM range
• Aggressive Sound: Deep, throaty exhaust note that EJ engines are famous for
• Quad Titanium Tips: Premium appearance with heat-resistant titanium
• Improved Flow: Reduced backpressure over factory exhaust
• Direct Fitment: Bolt-on installation using factory mounting points
• Durable Construction: Stainless steel resists corrosion and heat

Specifications:

• Brand: Invidia
• Part Number: HS11STIGM4ST
• Product: Gemini/R400 Cat-Back Exhaust
• Design: Single-layer with quad titanium tips
• Material: Stainless steel piping with titanium tips
• Weight: 62.6 lbs
• Made in: Japan

Fitment Information:

• Compatible Vehicles:
• 2011-2014 Subaru WRX Sedan (all models)
• 2011-2014 Subaru STI Sedan (all models)
• IMPORTANT - Sedan Only:
• This exhaust is designed for sedan models only
• Will NOT fit hatchback models (different rear bumper and exhaust routing)
• Verify your WRX/STI is a sedan before purchasing

What's Included:

• Invidia Gemini/R400 cat-back exhaust system (complete)
• Gaskets
• Mounting hardware
• Installation instructions

Installation Notes:

• Professional installation recommended
• Direct bolt-on - no cutting or modifications required
• Lift or jack stands required for access
• May require exhaust system adjustment for proper fitment
• Check local noise regulations before installation

Quad Titanium Tips - Premium Appearance:

The Gemini/R400 features quad titanium tips that provide a premium, high-end appearance. Titanium is chosen for its heat resistance, light weight, and distinctive appearance that develops a beautiful blue/purple patina over time. The quad tip design fills out the sedan's rear bumper perfectly, creating an aggressive, purposeful look that sets your WRX or STI apart.

Single-Layer Design - Aggressive Sound:

The single-layer design creates the aggressive, deep exhaust note that Subaru enthusiasts love. Unlike dual-wall exhausts that muffle sound, the single-layer construction allows the full character of the EJ25 engine to come through. The sound is loud and aggressive under acceleration but remains civilized during normal driving, making it suitable for daily use.

Gemini/R400 - The Legend:

The Gemini (also known as R400) is one of Invidia's most popular exhaust systems for the WRX and STI. The name comes from the dual exhaust outlets on each side (Gemini = twins), and the R400 designation refers to the aggressive sound level. This exhaust has been proven on thousands of WRX and STI builds worldwide, making it a safe choice for anyone seeking the perfect combination of sound and performance.

Proven Power Gains:

Invidia's testing shows the Gemini/R400 delivers measurable horsepower and torque gains on WRX and STI applications. The improved exhaust flow reduces backpressure, allowing the turbocharged EJ25 engine to breathe better and produce more power. The gains are especially noticeable in the mid-range and top-end where the factory exhaust becomes most restrictive.

Direct Bolt-On Fitment:

The Gemini/R400 is engineered specifically for the 2011-2014 WRX and STI sedan chassis, providing direct bolt-on fitment using factory mounting points. No cutting, welding, or modifications are required. The exhaust connects to the factory midpipe (or aftermarket downpipe) and uses factory hangers for secure mounting.

Why Invidia?

Invidia has been manufacturing premium exhaust systems for Japanese performance vehicles for over 20 years. Their exhausts are known for combining excellent sound quality, proven power gains, and reliable construction. Every Invidia exhaust is manufactured in Japan to the highest quality standards and tested extensively before release.

Perfect for EJ25 Turbo Sound:

The WRX and STI's turbocharged EJ25 engine is known for its incredible sound potential, and the Gemini/R400 exhaust unlocks that potential. The combination of single-layer design and optimized piping creates the perfect exhaust note - aggressive and loud when you want it, but not obnoxious during normal driving.

Installation Tips:

• Lift vehicle or use jack stands for access
• Spray penetrating oil on exhaust bolts before removal
• Use new gaskets (included) for leak-free installation
• Torque all bolts to specification
• Check for exhaust leaks after installation
• May need to adjust exhaust hangers for proper alignment

Perfect For:

• 2011-2014 WRX/STI sedan owners seeking aggressive exhaust sound
• Daily drivers wanting proven power gains and premium appearance
• Track cars requiring improved exhaust flow
• Anyone upgrading from restrictive factory exhaust
• Enthusiasts seeking legendary Gemini/R400 quality

Perfect For: 2011-2014 Subaru WRX/STI sedan owners seeking the legendary Invidia Gemini/R400 cat-back with quad titanium tips, aggressive sound, and proven power gains.

Pro Tip: The single-layer design creates the aggressive EJ sound that Subaru enthusiasts love - loud under acceleration, civilized during cruising.

Sedan Only: This exhaust is designed for sedan models only. Will NOT fit hatchback models.

Transform your WRX/STI sedan with Invidia Gemini/R400 - quad titanium tips, single-layer, aggressive sound, proven power gains, direct bolt-on, made in Japan.