For Subaru WRX owners seeking to boost both the performance and the auditory appeal of their vehicle, installing a Corsa Performance Exhaust system offers a compelling upgrade. Known for their high-quality construction and distinctive sound profiles, Corsa exhausts can enhance horsepower, improve exhaust flow, and deliver a deeper, more aggressive tone without excessive drone. This comprehensive guide will walk you through every step of the installation process, ensuring a safe, effective, and satisfying upgrade to your WRX.

Why Choose a Corsa Performance Exhaust for Your Subaru WRX?

Corsa exhaust systems are engineered with patented Reflective Sound Cancellation (RSC) technology, which eliminates unwanted drone while preserving a powerful, throaty exhaust note. Unlike many aftermarket exhausts that increase noise at cruising speeds, Corsa systems provide a refined sound that enhances the driving experience without becoming fatiguing on longer trips. Additionally, the high-flow design reduces backpressure, which can translate to improved throttle response, increased horsepower, and enhanced fuel efficiency.

Constructed from durable stainless steel, Corsa exhausts resist corrosion and maintain their appearance and performance over time. The precision fit ensures easy installation and compatibility with your WRX’s factory mounting points, making it an ideal upgrade for enthusiasts who want both form and function.

Comprehensive Tools and Materials Checklist

  • Socket set (including metric sizes) and ratchet
  • Torque wrench with torque specifications appropriate for exhaust bolts
  • Hydraulic floor jack and sturdy jack stands or ramps
  • WD-40, penetrating oil, or a rust dissolver spray
  • New Corsa Performance Exhaust kit specific to the Subaru WRX model year
  • Safety gloves and eye protection goggles
  • Rubber mallet (to gently persuade stubborn components)
  • Exhaust hanger removal tool or pry bar (optional but helpful)
  • Anti-seize lubricant for bolts
  • Torque angle gauge (optional, for precise bolt tightening)

Preparing Your Subaru WRX for Exhaust Installation

Before beginning the installation, it’s critical to prepare your workspace and vehicle properly to ensure safety and ease of access.

Step 1: Work Area Setup

Park your WRX on a flat, level surface with adequate lighting. Engage the parking brake and, if possible, place wheel chocks behind the front tires to prevent any movement. Gather all tools and materials so they are within easy reach.

Step 2: Safety Precautions

Wear safety gloves and goggles to protect your hands and eyes from sharp edges, rust, and debris. The exhaust can get extremely hot, so ensure the vehicle has cooled down completely before touching any components.

Step 3: Raising the Vehicle

Use a hydraulic jack to lift the rear of the car, then securely place jack stands under the designated lift points recommended in the WRX owner’s manual. Never rely solely on the jack to support the vehicle. Alternatively, use automotive ramps to elevate the rear end safely.

Step 4: Loosening Rusted Components

Apply WD-40 or penetrating oil liberally to all exhaust bolts, clamps, and hangers. This chemical treatment helps break down rust and corrosion, making removal easier and reducing the risk of bolt breakage. Allow approximately 10-15 minutes for the oil to penetrate thoroughly.

Removing the Factory Exhaust System

Removing the existing exhaust requires patience and care to avoid damaging other undercarriage components or the exhaust hangers.

Step 1: Locate and Identify Exhaust Components

Familiarize yourself with the layout of the factory exhaust system. Key components typically include the mid-pipe, catalytic converter (if applicable), resonator, muffler, and exhaust tips. The Corsa system may replace the entire assembly or just portions depending on the kit purchased.

Step 2: Unbolt Exhaust Clamps and Flanges

Using the socket set, carefully loosen and remove bolts attaching the exhaust to the catalytic converter or mid-pipe. Some WRX models may have flange bolts or clamp-style connections. Keep track of all hardware, as some bolts may be reused depending on the Corsa kit.

Step 3: Detach Exhaust Hangers

Exhaust hangers are rubber mounts that hold the exhaust in place. Use an exhaust hanger removal tool or pry bar to gently slide the exhaust tips out of the hangers. Applying a bit of lubricant here can ease the process. Be cautious not to tear the rubber hangers if you plan to reuse them.

Step 4: Carefully Lower and Remove the Exhaust

Once all bolts and hangers are free, carefully lower the exhaust system from the vehicle. Having a helper can make this step safer and prevent accidental damage. Inspect all removed components for rust or damage, especially the hangers and mounting points, and replace if necessary.

Installing the Corsa Performance Exhaust System

With the factory exhaust removed, you’re ready to install the new Corsa system. Follow these detailed steps to ensure a proper fit and optimal performance.

Step 1: Lay Out the New Exhaust Components

Unbox your Corsa Performance Exhaust kit and identify each part. Compare them to the factory system to understand where each piece fits. Most kits come with detailed instructions and diagrams tailored for the WRX model year.

Step 2: Pre-Assembly and Inspect Components

Before installation, loosely assemble sections of the exhaust on the ground to verify fitment and orientation. Check welds, clamps, and mounting brackets for defects or damage from shipping.

Step 3: Position the Exhaust Under the Vehicle

Starting from the front (near the catalytic converter or mid-pipe), position the Corsa exhaust under the car. Align the pipes with existing mounting points and exhaust hangers. You may need to slightly rotate or adjust the exhaust to fit precisely.

Step 4: Attach Exhaust Hangers

Slide the new or existing rubber hangers onto the exhaust mounts. If the kit includes new hangers or isolators, install these to reduce vibrations and noise. Applying a small amount of lubricant can ease hanger installation.

Step 5: Hand-Tighten Bolts and Clamps

Begin fastening the exhaust system by hand-tightening all bolts, clamps, and flanges. This allows for minor adjustments to alignment and ensures there is no binding or undue stress on any component.

Step 6: Ensure Proper Clearance

Check that the exhaust pipes have ample clearance from the undercarriage, suspension components, and the vehicle’s body to prevent rattling or heat damage. The pipes should not touch the frame or any moving parts.

Step 7: Torque Bolts to Manufacturer Specifications

Using a torque wrench, tighten all bolts and clamps to the specific torque settings provided in the Corsa installation manual. Over-tightening can strip threads or damage components, while under-tightening may lead to leaks and rattles.

Step 8: Double-Check All Connections and Supports

Verify that all bolts are secure, hangers are properly seated, and the exhaust system feels stable. Gently shake the exhaust to confirm no excessive movement or looseness.

Post-Installation Checks and Testing

After installation, it’s important to test the exhaust system to confirm that it operates correctly and safely.

Step 1: Lower the Vehicle

Carefully remove the jack stands and slowly lower the WRX back to the ground. Avoid any sudden drops or movements that could misalign the exhaust.

Step 2: Start the Engine and Inspect for Leaks

Start your Subaru WRX and listen attentively for any exhaust leaks, which may sound like hissing or popping near connection points. Visually inspect the joints for any escaping gases or unusual smoke.

Step 3: Check for Unusual Noises

While idling, pay attention to any rattling, buzzing, or vibrations that might indicate loose components or improperly seated hangers. If you detect any issues, shut off the engine and re-inspect the system.

Step 4: Conduct a Short Road Test

Take your WRX for a brief drive to observe exhaust sound quality and performance improvements. Listen for smooth acceleration, a deeper exhaust note, and the absence of drone or rattling. Be alert for any warning lights or unusual engine behavior.

Step 5: Post-Drive Inspection

After the test drive, once the car has cooled, re-check all bolts and hangers to ensure none have loosened due to thermal expansion or vibrations. Retighten as necessary.

Maintenance Tips for Your Corsa Performance Exhaust

To keep your new exhaust system performing at its best and looking great, consider the following maintenance advice:

  • Regular Inspections: Periodically check exhaust clamps, bolts, and hangers for tightness and wear, particularly after extended highway driving or rough roads.
  • Clean the Exterior: Use a mild detergent and water to clean the visible parts of the exhaust. Avoid abrasive cleaners that can damage the stainless steel finish.
  • Protect Against Corrosion: Although stainless steel resists rust, exposure to road salt and moisture can cause surface discoloration. Rinse the undercarriage after winter driving.
  • Monitor for Leaks: If you notice a sudden change in exhaust sound or performance, inspect the system for leaks or damage.
  • Professional Servicing: For complex issues or upgrades, consult a professional mechanic familiar with Subaru WRX exhaust systems.

Frequently Asked Questions (FAQs)

Will installing a Corsa exhaust void my Subaru warranty?

Generally, installing an aftermarket exhaust does not void the entire vehicle warranty, but it may affect warranty claims related to the exhaust system or engine if the modification is found to cause damage. It is best to consult your dealership or review your warranty terms before installation.

Is the Corsa exhaust system compatible with all Subaru WRX model years?

Corsa offers exhaust kits tailored to specific WRX model years and trims. Always verify compatibility by checking the product details or contacting the manufacturer to ensure a perfect fit.

Does the Corsa exhaust improve horsepower?

Yes, due to improved exhaust flow and reduced backpressure, the Corsa exhaust can provide a modest increase in horsepower and torque, especially when combined with other performance modifications.

How loud is the Corsa exhaust compared to the stock system?

The Corsa exhaust produces a deeper, more aggressive tone but is engineered to minimize cabin drone and excessive noise. It strikes a balance between performance sound and everyday drivability.

Conclusion

Upgrading your Subaru WRX with a Corsa Performance Exhaust is a rewarding project that enhances both the car’s sound and performance characteristics. By following this detailed installation guide, you can ensure a smooth and secure fitment that maximizes the benefits of your new exhaust system. Remember, taking the time to prepare properly, using the right tools, and performing thorough post-installation checks will help you enjoy your WRX’s enhanced driving experience for years to come. If at any point you feel uncertain about the process, seeking assistance from a qualified mechanic is a wise choice to protect your investment and vehicle.