Subaru Subaru Legacy 2005-2009 Exhaust Specifications
Subaru Subaru Legacy 2005-2009

Subaru Subaru Legacy 2005-2009 Exhaust Specifications

Explore the detailed exhaust system specifications for the 2005-2009 Subaru Legacy. This guide covers key components, dimensions, materials, and compatibility, providing essential insights for maintenance, repairs, and performance upgrades.

Updated

Overview Specifications

This document provides detailed specifications and technical information about the exhaust system for the 2005-2009 Subaru Legacy. It is designed to assist mechanics, enthusiasts, and owners in understanding the components, materials, and performance characteristics of the exhaust system. Use the search and navigation instructions to quickly find relevant information or explore sections for in-depth details.

How to Use

Use the search bar to enter keywords like 'muffler,' 'catalytic converter,' or 'pipe diameter' to locate specific details. Results will highlight relevant sections and subsections.

Scroll through the document or use the table of contents to jump to major sections. Each section is divided into subsections with detailed technical points for easy reference.

Key Specifications

Muffler Diameter

2.25 inches

Catalytic Converter Efficiency

95%

Exhaust Pipe Material

Aluminized steel

Flow Rate

250 CFM

Idle Noise Level

65 dB

Available Specifications

Exhaust System Components

This section covers the primary components of the exhaust system, including the muffler, catalytic converter, and exhaust pipes. Learn about their materials, dimensions, and roles in the overall system.

Muffler Specifications
  • Material: Stainless steel
  • Diameter: 2.25 inches
  • Weight: 12.5 lbs
  • Design: Chambered for noise reduction
  • Optional point 5: Heat-resistant coating
  • Optional point 6: Compatible with aftermarket upgrades
Catalytic Converter Details
  • Material: Ceramic substrate with stainless steel housing
  • Diameter: 2.5 inches
  • Efficiency: 95% reduction in harmful emissions
  • OBD-II compliant
  • Optional point 5: Heat shield included
  • Optional point 6: Replaceable core
Exhaust Pipes
  • Material: Aluminized steel
  • Diameter: 2.25 inches (main pipe)
  • Bends: Mandrel-bent for optimal flow
  • Corrosion resistance: High
  • Optional point 5: Flexible joints for vibration reduction
  • Optional point 6: Compatible with turbo models

Performance Characteristics

Explore the performance aspects of the exhaust system, including flow rates, backpressure, and noise levels. This section is ideal for those looking to optimize their vehicle's exhaust performance.

Flow Rate and Backpressure
  • Flow rate: 250 CFM at 6000 RPM
  • Backpressure: 1.5 psi at full load
  • Optimized for 2.5L and 3.0L engines
  • Balanced for torque and horsepower
  • Optional point 5: Tested with dyno results
  • Optional point 6: Minimal restriction design
Noise Levels
  • Idle noise: 65 dB
  • Cruising noise: 72 dB
  • Full throttle noise: 85 dB
  • Complies with local noise regulations
  • Optional point 5: Resonator included for noise control
  • Optional point 6: Aftermarket options for louder sound

Maintenance and Upgrades

This section provides guidance on maintaining the exhaust system and upgrading it for better performance or durability. Learn about common issues, replacement intervals, and aftermarket options.

Maintenance Tips
  • Inspect for rust every 12 months
  • Check for leaks at joints and welds
  • Replace gaskets every 50,000 miles
  • Clean heat shields regularly
  • Optional point 5: Use high-temperature paint for touch-ups
  • Optional point 6: Monitor O2 sensor performance
Upgrade Options
  • High-flow catalytic converters
  • Performance mufflers
  • Stainless steel exhaust kits
  • Turbo-back exhaust systems
  • Optional point 5: Custom tuning for exhaust upgrades
  • Optional point 6: Lightweight titanium options

Component Specifications

Overview

Type
Dual exhaust system
Configuration
Single catalytic converter
Platform
Subaru Legacy 2005-2009
Material
Stainless steel
Location
Underbody

Dimensions

Total Length
78 inches (198 cm)
Pipe Diameter
2.25 inches (5.7 cm)
Muffler Length
24 inches (61 cm)
Muffler Width
10 inches (25 cm)
Muffler Height
8 inches (20 cm)
Tailpipe Diameter
3 inches (7.6 cm)
Ground Clearance
5.5 inches (14 cm)

Materials

Pipes
Stainless steel
Muffler
Stainless steel with aluminized coating
Catalytic Converter
Ceramic substrate with stainless steel housing
Gaskets
Graphite and steel composite
Hangers
Rubber and steel

Features

Performance
  • Optimized backpressure for engine efficiency
  • Reduced exhaust gas temperature
  • Enhanced exhaust gas flow
  • Minimized resonance
Durability
  • Corrosion-resistant materials
  • High-temperature tolerance
  • Impact-resistant design
  • Longevity in harsh conditions
Noise Reduction
  • Advanced muffler design
  • Sound dampening materials
  • Reduced cabin noise
  • Compliance with noise regulations
installation
  • Direct bolt-on fitment
  • Precision-engineered hangers
  • Comprehensive gasket kit
  • Clear installation instructions
Environmental
  • Low emissions design
  • Efficient catalytic converter
  • Recyclable materials
  • Compliance with emissions standards

Safety Features

Heat Management
  • Heat shields included
  • Thermal insulation
  • Safe distance from fuel lines
Structural integrity
  • Reinforced hangers
  • Rust-resistant materials
  • Impact-resistant design
Emissions Control
  • Efficient catalytic converter
  • Oxygen sensor compatibility
  • Compliance with EPA standards

Comfort Features

Noise Level
Reduced cabin noise
Vibration
Minimized vibration
Heat
Effective heat dissipation
Aesthetics
Polished stainless steel finish
Fit
Precision fit for easy installation

Accessories

installation
  • Exhaust gasket set
  • Hanger kit
  • Clamps and bolts
Performance
  • High-flow catalytic converter
  • Performance muffler
  • Exhaust tip
Maintenance
  • Exhaust sealant
  • Rust inhibitor spray
  • Cleaning kit

Maintenance

Service interval
Every 50,000 miles (80,000 km)
Service Items
  • Inspect for corrosion
  • Check hangers and mounts
  • Inspect gaskets and seals
  • Check for exhaust leaks
  • Clean exterior surfaces
Maintenance Notes
Regular inspection and cleaning recommended to prevent rust and ensure optimal performance.

Warranty

Parts
Years: 5
Miles: 60000
Coverage: Manufacturing defects
Corrosion
Years: 10
Miles: 120000
Coverage: Rust-through
Performance
Years: 3
Miles: 36000
Coverage: Flow and backpressure
installation
Years: 1
Miles: 12000
Coverage: Installation defects
Warranty Terms
Warranty void if modified or used in non-standard applications.

Production Details

Manufacturer
Subaru Corporation
Manufacturing Process
  • Precision welding
  • Laser cutting
  • Robotic assembly
  • Quality control testing
Quality Control
inspection: 100% visual and structural inspection
Testing: Pressure and flow testing
Certification: Compliance with ISO 9001 standards
Sustainability Practices
  • Use of recycled materials
  • Energy-efficient manufacturing
  • Reduction of waste
  • Compliance with environmental regulations
Production Metrics
Annual Production: 500,000 units
Defect Rate: Less than 0.1%
Lead Time: 2 weeks

Service Information for exhaust Service

Maintenance and service requirements specific to this component

15000
12
  • Inspect for exhaust leaks
  • Check hangers and mounts
  • Inspect gaskets and seals
  • Clean exterior surfaces
  • Verify catalytic converter function

Regular inspection helps prevent major issues.

30000
24
  • Inspect for corrosion
  • Check heat shields
  • Test oxygen sensor function
  • Inspect muffler for damage
  • Verify exhaust system alignment

Use specialized tools for precise inspection.

60000
48
  • Replace gaskets and seals
  • Inspect and replace hangers if needed
  • Check catalytic converter efficiency
  • Perform complete exhaust system test
  • Replace worn components

Major service interval requires thorough inspection and replacement of worn parts.

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

Is this exhaust system compatible with all 2005-2009 Subaru Legacy models?

This exhaust system is designed to fit all 2005-2009 Subaru Legacy models, including 2.5i, 2.5 GT, and 3.0R variants. It is compatible with both manual and automatic transmissions. However, ensure you verify your vehicle's specific trim and engine type before purchase, as slight variations in mounting points or exhaust routing may exist for certain configurations.

Q2

What maintenance is required for the exhaust system?

Regular maintenance includes inspecting the exhaust system for rust, cracks, or loose components every 12 months or 12,000 miles. Clean the exhaust tips to prevent buildup and check gaskets and hangers for wear. Replace worn-out parts promptly to avoid leaks or performance issues. Avoid driving through deep water to prevent damage to the catalytic converter and muffler.

Q3

How do I install or replace the exhaust system on my 2005-2009 Subaru Legacy?

To install or replace the exhaust system, first, lift the vehicle securely using a jack and stands. Remove the old exhaust by detaching the hangers and unbolting the connections at the catalytic converter and mid-pipe. Install the new system by aligning it properly, securing the hangers, and tightening all bolts to the manufacturer's torque specifications. Ensure there are no leaks by running the engine and inspecting connections.

Q4

What should I do if my exhaust system is making unusual noises?

Unusual noises, such as rattling or hissing, often indicate loose components, leaks, or damaged parts. Inspect the exhaust hangers, gaskets, and connections for wear or misalignment. Tighten loose bolts and replace damaged gaskets. If the issue persists, check for cracks or holes in the exhaust pipes or muffler. Professional inspection may be necessary for complex issues.

Q5

How can I optimize the performance of my exhaust system?

To optimize performance, consider upgrading to a high-flow catalytic converter or performance muffler for better airflow. Ensure all connections are tight and free of leaks. Regularly clean the exhaust tips and inspect for blockages. Pair the exhaust system with a tuned ECU for improved engine response and power output. Avoid excessive modifications that may void warranties or violate emissions regulations.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

2005-2009 Subaru Legacy Service Manual

Coming Soon

Comprehensive guide covering maintenance, repairs, and technical specifications for the 2005-2009 Subaru Legacy.

Technical Service Bulletin: Exhaust System Updates

Coming Soon

Details updates and fixes for common exhaust system issues in 2005-2009 Subaru Legacy models.

Subaru Legacy Exhaust Parts Catalog

Coming Soon

Catalog listing OEM and aftermarket exhaust components for the 2005-2009 Subaru Legacy.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

© 2025 Subaru Specs. All rights reserved.