Unlocking the Power: 992 GT3 RS +25 WHP Without Tune with Fi EXHAUST Race Version

The Porsche 992 GT3 RS is already a formidable sports car, delivering exceptional performance straight from the factory. However, for enthusiasts looking to extract every ounce of potential, upgrading the exhaust can lead to significant power gains.

When Porsche unveiled the facelifted 991.2 GT3 RS, it featured a 20-horsepower increase over its predecessor, the 991.1 GT3 RS. However, with the release of the new 992.1 GT3 RS, engine power only saw a modest boost of 5 horsepower—the smallest increase in the GT3 RS lineup. This is largely due to new regulatory restrictions, such as OPF/GPF filters. Our dyno results, however, indicate that without these restrictions in place, an additional 25 horsepower could be achieved for owners of this road legal race car.

992 GT3 RS dyno test was conducted with our new Race Version setup comparing against the stock setup without ECU tune or other aftermarket performance modifications. The Race Version exhaust configuration consists of long tube catless headers, and high-flow muffler with an x-pipe that replaces the bulky and heavy factory muffler weighing 37.2 lbs (16.87 kg). Thanks to our high-flow design the driver can now enjoy more performance and race inspired sound note that was previously trapped by catalytic converters and OPF filters.

Horsepower Gains And Torque Improvements

Our Fi EXHAUST Race Version delivers a clear performance advantage over the stock exhaust, especially in the mid-range, while also achieving higher peak power. The Fi exhaust reaches an impressive 484.70 WHP at 8,590 RPM, compared to the stock exhaust's 467.16 WHP at 8,490 RPM, highlighting a gain of 17.54 WHP at peak output.

The power gains are most noticeable in the mid-range:

At 4,838 RPM, the stock exhaust (blue line) produces 252.46 WHP, while the Fi exhaust (red line) boosts that to 278.98 WHP—a significant increase of 26.52 WHP.

At 6,800 RPM, the stock setup (blue line) achieves 395.49 WHP, whereas the Fi exhaust (red line) takes it to an impressive 420.37 WHP, delivering an increase of 24.88 WHP.

This translates to a more engaging driving experience, as the engine feels more powerful and responsive across a broader RPM range, making the Fi EXHAUST Race Version a must-have for anyone looking to enhance both street and track performance of the Porsche 992 GT3 RS.

The torque curve follows a similar trend. With the stock exhaust, torque reaches 41.74 kg-m (409 Nm) at around 6,800 RPM, while the Fi exhaust boosts this to 44.37 kg-m (435 Nm). The 2.63 kg-m improvement in mid-range torque (especially between 4,000 and 6,000 RPM) ensures quicker acceleration, particularly noticeable in everyday driving.

Power Delivery Characteristics

The dyno graph also reveals that the Fi exhaust not only increases peak power but also improves the overall power band. The red line consistently stays above the blue line from about 4,000 RPM all the way to the redline, indicating more power available throughout the rev range . Factory exhaust begins to lose its edge at higher RPMs.

Exhaust Note and Driving Experience

While the dyno results highlight significant power and torque gains, an Fi upgrade also enhances the aural experience. We're known for our aggressive and race-inspired sound, which create a more engaging driving experience, providing an exhilarating soundtrack that complements the 992 GT3 RS's high-revving nature.