big of a difference in "mm" from stock? how many more hp's do u think it will give?

 

Not available yet as far as I know, unless someone has an inside scoop. I am interested in this mod too.

 

Due next week, called them yesterday. Will aos be releasing Headers, X-Pipe Mufflers, Cold Air Kit & Intake Cover and Throttle Body. Later during the summer they will be offering chasis support parts. Im lookin forward to see what kind of $ are out on the BBK Short headers.......