Porsche 992 GT3 & GT3RS Headers: Catless vs. Catted – Which Is Right for You?

The Porsche 992 GT3 and GT3RS are engineering masterpieces straight from Stuttgart. But for enthusiasts chasing every ounce of performance, sound, and throttle response, upgrading the factory headers is one of the most effective modifications you can make.

At Momentum Motorsports, we offer both catless headers and catted headers designed specifically for the 992 GT3 and GT3RS. Each option comes with unique benefits depending on your goals—whether it’s maximum power on the track or emissions compliance on the street.

Why Upgrade Your Headers?

The factory exhaust system is designed to balance performance, emissions, and comfort. However, it’s also restrictive. Upgrading to performance headers unlocks:

• Horsepower & Torque Gains – Freer-flowing exhaust gases mean improved scavenging and increased output. Gains of 15–25+ HP are possible depending on setup.

• Sharper Throttle Response – Experience instant feedback and a more connected driving feel.

• Exhaust Note Enhancement – A more aggressive, motorsport-inspired sound that amplifies the GT3’s naturally aspirated character.

• Weight Reduction – Aftermarket headers often save weight compared to bulky OEM components.

Catless Headers – Maximum Performance

For the driver chasing raw performance and sound, catless headers are the ultimate choice.

• Benefits:

  • Maximum horsepower and torque gains

  • Aggressive exhaust tone with unrivaled volume and character

  • Reduced weight compared to catted options

• Important Notes:

  • A Stage 2 ECU Tune is required to run catless headers. This ensures the engine runs safely, eliminates check engine lights, and fully capitalizes on the performance potential.

  • Intended for off-road/track use only – catless systems will not pass emissions testing in most states.

Catted Headers – Performance With Compliance

For those who want performance gains without sacrificing emissions compliance, our catted headers are the perfect solution.

• Benefits:

  • Excellent performance gains, only slightly less than catless options

  • Cleaner emissions and reduced exhaust smell

  • Will pass emissions testing in most states

  • No ECU tune required (though optional tuning can extract even more performance)

• Best For:

  • Street-driven GT3 and GT3RS owners

  • Enthusiasts in states with strict emissions standards

  • Those who want a refined yet sporty exhaust upgrade

Which One Should You Choose?

• Choose Catless Headers if you’re building a track-focused GT3 or GT3RS, want maximum sound and performance, and are prepared to run a required ECU tune.

• Choose Catted Headers if you want strong performance gains while keeping your car emissions-compliant for the street.

Final Thoughts

No matter which route you take, upgrading the headers on your Porsche 992 GT3 or GT3RS is one of the best ways to enhance its already incredible driving experience. Whether you want track-ready power or street-friendly performance, Momentum Motorsports has you covered.

👉 Explore our full line of Porsche 992 GT3/GT3RS exhaust upgrades today and take your Porsche to the next level