Ok, so I am about to buy some shorty's for my 91 350 TPI. Two questions. Concerning y-pipe. I have the factory dual cat y pipe. Of course, I am trying to do this the cheapest way possible. For whatever header I choose, Should I just try and reuse my factory y-pipe? Like I said , I am thinking what would be cheaper. I was thinking about re-using the factory ypipe by cutting it close to the connection to the exhaust manifolds. Then having a muffler shop weld it together to the new headers. Looks like no matter what brand of header I choose, some fabrication is needed anyway. I would like to find a deal with the y-pipe included, but that is proving to be tough under $150 even used! Also, should I choose a header that has air provisions? or try to keep within budget and say the hell with air?

 

you are right about it being tough to find something for 150 or so. I have the same dual cat set up on my car and I went with Edelbrock headers (T.E.S.) bought them for the emissions hook ups. They come with two short extensions and instructions on where to cut your factory Y pipe. Pricey though, so might not be an option for you. You can get a look at the instructions for these on Jegs.com