The perfectly balanced mid engine Cayman is Germany's canyon carving track meister. Unfortunately, the Cayman was delivered slightly under powered from the factory so as not to threaten the Carrera's thrown. The Cayman IPD intake plenum delivers increased performance that puts the Cayman in the ring with the Carrera. The IPD Plenum out performs every other intake system on the market. Don't be fooled by other competitors claiming to offer Plenums. All factory P air distributors are of the "T" variety and therefore suffer from less than ideal air flow and intake air speed.The IPD Cayman "Competition" Plenum was designed to meet the needs of the most demanding Cayman S enthusiasts. The "Competition" Plenums is even larger and utilizes the 997 GT3 82mm throttle body allowing it to deliver even greater air flow and substantial increases in performance.