Quote Originally Posted by gta87305 View Post
Will the factory 5.3 y pipe fit in an obs truck like a 1995 GMC sierra with a 4l60e 4wd. I would like to use the stock 5.3 pipe if possible? If not any pics to give me some ideas on how to route it . Thanks
we did a conversion on a '91, the stock Y fit. I can't remember if we had to cut and persuade it to fit, but it was very close or did fit.
We used the cats as well.
Depending on how far forward to back you set the engine will determine if the stock manifold flanges will clear the frame. You might have to grind a little bit on the flange.