What type of Y-Pipe do I have?

[greg82255]

Hi all,

I just bought a '94 Formula F250 with a Mercruiser 7.4/Bravo. The marina winterized and stored it for the winter as part of the sale, so I didn't get a chance to get the engine serial # before they put it away. I am wondering what type of Y-pipe I have on the back - whether it is oval or circular, as I am looking to get a captain's call exhaust system for it. It has standard cast-iron manifolds with 3-inch risers.

My old 1986 formula/mercruiser had a 3-inch circular Y-pipe, but I know many have oval shape. If anyone has some insight into what I may have, it would be appreciated. Unfortunately I won't have the serial # until I pick it up next year.

 

[alldodge]

You should have the same as I have on my Rinker and use to have on my Formula 27PC (cruiser came with 7.4L). They are oval part number 807130A4
http://www.mercruiserparts.com/Show_...%2E4L+BRAVO%29

Edit: and it should have 4 inch risers (elbows)

 

[Scott Danforth]

Stroker BBC for this boat?