Introduction

The 2020 Acura NSX is a marvel of modern automotive engineering, blending hybrid technology with a powerful twin-turbo V6 engine to deliver exhilarating performance and precision handling. While the NSX comes exceptionally well-equipped from the factory, many enthusiasts look to upgrade the exhaust system to unlock even greater power, improve sound quality, and enhance the overall driving experience. This guide will walk you through the benefits of upgrading your 2020 Acura NSX's exhaust system, the types of exhaust systems available, installation considerations, and tips for optimizing performance gains.

Why Upgrade the Exhaust System on Your 2020 Acura NSX?

The exhaust system plays a crucial role in managing engine performance by directing exhaust gases away from the engine, reducing backpressure, and influencing the sound of your vehicle. Upgrading the exhaust system on your Acura NSX can offer several tangible benefits:

1. Improved Horsepower and Torque

Factory exhaust systems are often designed to meet regulatory noise limits and emissions standards, which can restrict airflow and limit engine output. High-performance aftermarket exhausts are engineered to reduce backpressure and improve exhaust flow, allowing your engine to breathe more freely. This can result in noticeable gains in horsepower and torque, particularly when combined with other modifications such as ECU tuning or intake upgrades.

2. Enhanced Exhaust Sound

One of the most immediate and noticeable effects of an exhaust upgrade is the change in sound. The stock NSX exhaust is refined and balanced to suit a range of driving conditions, but many enthusiasts desire a more aggressive, sporty exhaust note. Aftermarket systems can provide a deeper, throatier growl or a sharper, race-inspired tone—depending on the type of system you choose.

3. Weight Reduction

Many aftermarket exhaust systems are constructed from lightweight materials like titanium or high-grade stainless steel. These materials can reduce the overall weight of your vehicle’s exhaust, contributing to improved handling and acceleration. For a performance car like the NSX, every pound saved counts toward better dynamics and responsiveness.

4. Aesthetic Appeal

Beyond performance and sound, upgraded exhaust systems often feature polished tips, carbon fiber accents, or unique designs that enhance the visual appeal of your NSX. This can elevate your car’s presence both on the road and at car shows.

Understanding the Stock Exhaust System on the 2020 Acura NSX

Before diving into upgrades, it's important to understand what the factory exhaust system consists of and how it functions on the NSX.

Factory Components Overview

  • Headers: The NSX uses twin-turbocharged V6 engine headers designed to optimize exhaust scavenging.
  • Catalytic Converters: These reduce harmful emissions and are integrated into the exhaust system to meet environmental regulations.
  • Mufflers: The mufflers control the exhaust noise and contribute to the NSX's refined sound profile.
  • Exhaust Tips: The NSX features a quad-exhaust tip design, which also acts as a visual signature of the car.

The factory system balances performance, emissions, noise regulations, and durability. While it is highly efficient, it is also somewhat restrictive in terms of maximum power output and sound tuning.

Types of Exhaust Upgrades for the 2020 Acura NSX

When considering an exhaust upgrade, there are several options depending on your performance goals, budget, and preferences on sound and appearance.

1. Cat-Back Exhaust Systems

A cat-back exhaust system replaces everything from the catalytic converter back to the exhaust tips. This is one of the most popular upgrades because it allows for better exhaust flow while keeping the factory catalytic converters, thus maintaining emissions compliance.

  • Advantages: Easier to install, retains catalytic converters, improved sound and performance.
  • Considerations: Gains are moderate compared to full systems; sound may vary depending on muffler design.

2. Turbo-Back Exhaust Systems

This upgrade replaces the entire exhaust system from the turbochargers to the exhaust tips, including downpipes and mid-pipes.

  • Advantages: Maximizes exhaust flow, significant horsepower gains, enhanced sound.
  • Considerations: May require ECU tuning, potential emissions compliance issues, higher cost and complexity.

3. Headers and Downpipes

Upgrading the headers or downpipes focuses on the initial stage of exhaust gas extraction from the engine. Aftermarket headers can improve exhaust scavenging, while high-flow downpipes reduce restrictions downstream of the turbochargers.

  • Advantages: Direct impact on turbo spool and power delivery, potential for substantial gains.
  • Considerations: Installation complexity, may trigger check engine lights if emissions sensors are affected.

4. Muffler Upgrades

Replacing the mufflers alone can alter the sound and slightly improve flow without changing the entire exhaust system.

  • Advantages: Affordable, easier to install, customizable sound.
  • Considerations: Limited performance gains, may not satisfy those wanting significant power boosts.

5. Resonator Deletes

Removing or replacing resonators can increase exhaust volume and change the tone, typically making the exhaust louder and more aggressive.

  • Advantages: Simple modification, enhances sound.
  • Considerations: Can create drone at cruising speeds, may affect emissions.

6. Titanium and Carbon Fiber Components

High-end exhaust systems often use lightweight materials such as titanium pipes and carbon fiber tips or heat shields.

  • Advantages: Weight savings, durability, unique aesthetics.
  • Considerations: Higher cost, may require specialized care.

Several manufacturers specialize in performance exhaust systems tailored for the 2020 Acura NSX. Here are a few well-regarded options:

  • Akrapovic: Known for premium titanium exhausts with aggressive sound and substantial weight savings. Akrapovic systems are often race-inspired and highly regarded for quality.
  • Armytrix: Offers valvetronic exhaust systems allowing adjustable sound levels via remote control, ideal for those wanting versatility.
  • HKS: A respected Japanese brand providing high-quality stainless steel exhausts with performance and durability in mind.
  • Invidia: Offers affordable cat-back and turbo-back systems with a focus on balanced sound and power gains.
  • Borla: Known for stainless steel construction and aggressive exhaust tones, Borla systems combine performance with aggressive styling.

Installation Considerations

Upgrading your NSX exhaust system is a significant modification that requires careful planning and execution.

Professional vs. DIY Installation

While some NSX owners with mechanical expertise may choose to install exhaust components themselves, professional installation is recommended to ensure proper fitment, avoid damage, and maintain vehicle warranty where applicable.

Emissions Compliance

Because exhaust modifications can affect emissions output, it is vital to ensure that your upgraded system complies with local laws. Some aftermarket parts are CARB (California Air Resources Board) exempt, meaning they are street-legal in California and other states with similar regulations. Always verify before purchasing.

ECU Tuning

To maximize the benefits of an upgraded exhaust system, ECU tuning is often necessary. Tuning recalibrates the engine’s fuel and ignition maps to accommodate the improved exhaust flow, unlocking additional horsepower and ensuring safe operation.

Warranty and Insurance Impact

Modifying the exhaust system can affect your vehicle’s warranty and insurance coverage. Check with Acura and your insurer before proceeding to understand any potential implications.

Step-by-Step Guide to Upgrading Your NSX Exhaust

If you decide to proceed with an upgrade, here is an overview of the typical steps involved:

  1. Research and Select Parts: Choose the type of exhaust upgrade that aligns with your goals and budget. Consider brand reputation, material quality, sound profile, and compatibility.
  2. Purchase Required Components: Order the necessary parts, including gaskets, clamps, and any additional hardware.
  3. Prepare the Vehicle: Safely elevate the car using jack stands or a lift, and ensure the exhaust is cool.
  4. Remove the Stock Exhaust: Unbolt and carefully remove the factory exhaust components to avoid damage.
  5. Install the New Exhaust: Fit the new system starting from the front (downpipes or cat-back area) and work rearward, ensuring proper alignment and secure connections.
  6. Check for Leaks and Secure Fitment: After installation, inspect all joints and hangers, tighten bolts, and confirm there are no exhaust leaks.
  7. Perform ECU Tuning: If applicable, have a professional tune your NSX to optimize performance gains.
  8. Test Drive and Adjust: Drive the vehicle to experience the new exhaust sound and performance, making any necessary adjustments.

Maximizing Performance Beyond the Exhaust

While upgrading the exhaust system is a highly effective way to improve your NSX’s performance, combining it with complementary modifications can yield even greater results:

  • Cold Air Intake: Improves airflow into the engine, enhancing combustion efficiency.
  • ECU Remapping or Piggyback Tuning: Optimizes engine parameters to fully leverage exhaust and intake upgrades.
  • Suspension Upgrades: Improve handling to match increased power output.
  • Brake Enhancements: Ensure you can safely slow down from higher speeds.
  • Lightweight Wheels: Reduce unsprung weight and improve acceleration and handling.

Sound Profiles: What to Expect from Different Exhaust Systems

The NSX’s stock exhaust is praised for its balanced and sophisticated sound, but aftermarket systems can alter this character dramatically. Understanding the typical sound profiles helps you choose the right system:

  • Deep and Throaty: Systems like Akrapovic’s titanium exhausts provide a rich, deep tone that resonates at higher RPMs, emphasizing the NSX’s sporty nature.
  • Race-Inspired Loudness: Some turbo-back systems produce aggressive crackles, pops, and a louder overall volume, ideal for track use but potentially intrusive on the street.
  • Adjustable Sound: Valvetronic systems from Armytrix or similar brands allow toggling between quiet and loud modes, perfect for street and track versatility.
  • Mild Enhancement: Cat-back systems with less restrictive mufflers offer a subtle improvement in exhaust note without overwhelming noise.

Maintaining Your Upgraded Exhaust System

Proper maintenance will ensure your upgraded exhaust system remains in peak condition and continues to deliver optimal performance and sound quality over time.

Regular Inspections

Check for signs of rust, corrosion, or loose fittings. Early detection of issues can prevent costly repairs.

Cleaning

Use appropriate cleaning agents designed for stainless steel or titanium to preserve the finish and prevent discoloration.

Heat Management

Aftermarket exhausts can run hotter than stock systems. Using heat wraps or shields can protect surrounding components and improve longevity.

Addressing Exhaust Leaks Promptly

Leaks can lead to performance loss and unwanted noise. Tighten clamps and replace gaskets as needed.

Conclusion

Upgrading the exhaust system on your 2020 Acura NSX is an excellent way to enhance its performance, sound, and appearance. Whether you seek a subtle improvement or a full race-inspired upgrade, understanding the types of exhaust systems available and their impact on your vehicle is essential. Combine your exhaust upgrade with proper tuning and complementary modifications to unlock the full potential of your NSX. With careful planning, professional installation, and attentive maintenance, your upgraded exhaust system will transform your driving experience, making your NSX stand out on every road and track.

Additional Resources

For further reading and detailed installation guides, consider visiting the following resources: