Our customer Rick just recently purchased our AP-996TT-174 for his 2002 Porsche 996TT. The hoses are designed to improve air flow by not allowing the hoses to expand under boost pressure, your OEM hoses do expand, and deteriorate over time. Upgrading to these simple do it yourself install boost hoses, will help ensure your Porsche reaches peak power, and have been tested to over 30PSI!! The Boost hoses are available in the following colors: Blue, Red, Silver, Yellow , and Black. We just wanted to share some pics of ricks awesome ride! Check out the pics below! You can find all our porsche product here.