IPD Porsche 981 Cayman GT4 3.8L Competition 82mm Plenum (‘13-’16)

IPD only offers "Competition" versions of the 981 Plenums which upgrades the factory 74mm throttle body with the larger 997 GT3 82mm throttle body. This combination has proven to be considerably more popular and delivers even more performance. This Competition version will work with both 3.4L "S" and 2.9L "Non-S" applications. Porsche made a few upgrades with the 981, most notably being that the 981 draws outside air from both driver and passenger air intakes instead of the driver's side only as previously found with all 986, 987 and 987.2 applications. IPD has developed a custom silicone hose designed to perfectly fit the larger 82mm TB and considerably improve airflow. The new 981 Plenums also benefits from the internal dimpling effect that we are now implementing on all future Plenums. This internal dimpling allows us to control the boundary layer and maximize airflow. Just like a dimpled golf ball travels farther than a smooth golf ball. Controlled turbulent air creates less fricti