Your factory transmission (auto) is good for about 325hp (max), so if you run nitrous or one of the NA-T turbo conversion kits then you will need our custom machined press tube kit. This will bump up power handling to approximately 450hp and makes for a nicer shift as well.
If you are okay with dropping the transmission pan you can do this pretty quick. Most any good transmission shop will install a valve-body upgrade kit for around $175.
You will receive a small package with our custom machined pressure tubes. These are readily installed by any transmission shop. These are designed to simply increase the pressure and allow more power. A new gasket is advised after installing.