IPD 74mm Plenum for 991.2 Porsche 911 Carrera / Carrera GTS / Carrera S [91274-3.0]

IPD 74mm Plenum for 991.2 Porsche 911 Carrera / Carrera GTS / Carrera S [91274-3.0]

The 991.2 Carrera marks the first Carrera to transition from natural aspiration to forced induction, using turbochargers. Despite reducing displacement to 3.0 liters (from 3.8L and 3.4L), Porsche achieved 414 HP and 368 TQ with twin turbos. While IPD Plenums offer significant performance improvements for naturally aspirated engines, their patented design delivers even more impressive horsepower and torque gains in turbocharged applications like the 991.2 Carrera. As with all IPD Plenums, the 991.2 Plenum optimizes airflow through its patented “Y” design, enhancing engine performance and improving boost response. Proven to provide substantial gains across the entire power band from launch to redline, the 991.2 Plenum guarantees an elevated driving experience for any Carrera.

Development

• Development began with a 1D simulation to optimize the handling of pulse peaks in the intake tract using various pipe geometries and the known engine parameters of the 992. The process then advanced to optimizing 2D slices of the plenum in CFD, with a focus on areas where adverse pressure gradients might cause flow separation. This allowed adjustments to the plenum’s curvatures and provided deeper insight into the airflow dynamics at full throttle. Once satisfied with the 2D results, the team moved to 3D modeling, incorporating all geometry to create a plug-and-play bolt-on part with optimal performance characteristics. After hundreds of geometric and CFD iterations, the team achieved not only an increase in mass flow compared to the stock intake but also improved uniformity in charge pressure and velocity across both branches.

Testing

• The Plenum’s efficiencies significantly reduce initial turbo lag at lower RPMs, allowing quicker access to power and torque. However, the majority of the power and torque gains begin at 4000rpm, where they are most needed and enjoyed. The horsepower and torque gains continue to increase, outperforming the factory air distributor as the engine revs higher, with peak gains of over 30 wheel horsepower and 32 wheel torque occurring in the 6000rpm range.

Features

• Optimized airflow
• Improved boost response
• Patented “Y” design
• +30whp & +32 w/tq (@6000rpm)

Applications

• Porsche 911 Carrera: 991.2 (2015-2019) – 3.0L TT F6
• Porsche 911 Carrera GTS: 991.2 (2017-2019) – 3.0L TT F6
• Porsche 911 Carrera S: 991.2 (2015-2019) – 3.0L TT F6

Notes

• It is highly recommended that the installation of all Turbo Plenums be performed by qualified and trained Porsche technicians

About IPD Plenums

Innovative Pro Design (IPD), founded in 2004 by Mike “Turbo” Kirakosyan, is based in Southern California, the heart of Porsche tuning. IPD is renowned for its patented “Y” design Intake Plenums, which enhance power and torque through optimized airflow. Developed with Mike’s extensive experience as a fabricator, engine builder, and Porsche expert, the Plenums underwent rigorous testing, including over 1000 dyno pulls. With a product range covering over 60 Porsche models, IPD continues to innovate and fine-tune its designs. Backed by a 100% satisfaction guarantee, IPD consistently delivers impressive, dyno-proven performance gains, making it the ultimate Porsche performance upgrade.