seems like most of the 996tt on here are 6 speeds... I have a tiptronic, but looking to do some performance upgrades... anyone know if there is a limit or any problems upgrading a 996tt tiptronic? not looking to go crazy .. but would like to get an extra 100 to 150 hp...

 

There are threads that people discussed how much hp a Tip can handle... just do a search.

 

i've been running around 600 hp tip for 2 yrs , no problem . then i went to 700 hp i installed EVOMS torque convertor and again no problems at all but i didnt use the car for a long time bcs i went to the next level !!!!! So don't worry about 100 to 150 hp .