Description

COMPLETE BOTTLENECK ELIMINATION – REVOLUTIONARY OUTLET + FRONT PIPE SYSTEM FOR THE 4G63.

The Unlimited Works Super Outlet Set for the Lancer Evolution VII, VIII, and IX represents the definitive solution to the CT-series platform’s most critical exhaust restriction.

By completely eliminating the factory 55mm bottleneck and replacing it with a seamlessly integrated 70mm outlet-to-76.3mm front pipe system, this comprehensive package delivers unrestricted flow from turbine to catalytic converter, transforming the 4G63’s exhaust characteristics and unlocking true performance potential.

Product Highlights

⚙️ COMPLETE BOTTLENECK ELIMINATION
The CT-series Evolution suffers from a fundamental design limitation: the factory outlet exit diameter is severely restricted to 55mm. This creates an unavoidable bottleneck—increasing front pipe diameter alone cannot overcome this restriction. The Super Outlet Set completely eliminates this constraint:

• Turbine Outlet Internal Diameter: 70mm

• Front Pipe Diameter: 76.3mm

• Result: True unrestricted flow from turbine to catalyst—a seamless, no-restriction outlet-to-front-pipe system

🔧 ADVANCED ENGINEERING SOLUTIONS

Factory Spherical Joint Elimination:
The restrictive 55mm factory spherical joint is completely eliminated, replaced by a high-capacity flex section that enables the larger diameter while addressing crack prevention.

Vibration & Crack Countermeasures:

• High-capacity flex section (bellows) absorbs vibration and thermal stress

• Outlet section engineered to minimize cracking potential

• Front pipe manufactured from high-quality domestic stainless steel for superior durability

O2 Sensor Repositioning:
To achieve the large internal capacity, the factory O2 sensor location has been modified. An extension harness is included for proper installation and functionality.

A/F Gauge Provision:
An A/F (Air/Fuel ratio) gauge mounting boss is included—essential for ECU tuning and proper engine monitoring.

🏎️ IMMEDIATE, TANGIBLE RESULTS

• Even with simple bolt-on installation: Noticeable increase in torque character and improved boost response

• With ECU Tuning: Further dramatic improvements realized

• The Result: The factory bottleneck is gone—the engine can finally breathe

🛡️ LOWER ARM BAR COMPATIBILITY

• Issue: The system may interfere with the factory lower arm bar

• Solution: Included spacers can provide clearance

• Recommendation: Removal of the lower arm bar is recommended (poses no issues whatsoever), as using spacers reduces minimum ground clearance

Technical Specifications & Application

Key Details

• Product Name: Super Outlet Set (Outlet + Front Pipe)

• Vehicle Application: Mitsubishi Lancer Evolution VII, VIII, IX (CT9A)

• Turbine Outlet Internal Diameter: 70mm

• Front Pipe Diameter: 76.3mm

• Factory Outlet Diameter: 55mm (restricted)

• Flow Increase: Radical improvement through complete bottleneck elimination

Included Components

• High-Flow Turbine Outlet: 70mm internal diameter

• High-Flow Front Pipe: 76.3mm diameter, domestic stainless steel construction

• High-Capacity Flex Section: For vibration absorption and crack prevention

• O2 Sensor Extension Harness: For modified sensor location

• A/F Gauge Mounting Boss: Factory-installed for air/fuel ratio monitoring

• Lower Arm Bar Spacers: For clearance if retaining factory bar (use not recommended)

Material & Construction

• Front Pipe Material: High-quality domestic stainless steel

• Outlet Construction: Engineered to minimize cracking potential

• Flex Section: High-capacity design for optimal vibration absorption

• Overall Quality: Premium Japanese manufacturing standards

Comparison