I picked up set pf DynaTech LT headers for my truck, and now I am wondering what to do about the Y pipe.

Will the headers install using the factory Y pipe? Would the factory Y pipe restrict the headers from making their max power? If so, how much restriction?

If I went with a DynaTech catted Y pipe would the power gained over the factory Y pipe be enough to validate spending the money for the DynaTech Y pipe?

Thanks for reading.