Found my leak! Next question

[duckmnn]

Ok it was my y pipe as I suspected . Upon removing motor one ear was broke off? Not sure how that happened ?? I’ve found a like new y pipe.Are they the same? The 4 bolt flange is same and they measure same width. it’s a little older. It’s off a 1992 small block. But it does have different flappers. I called Mercruiser today they were no help. I don’t want to restrict exhaust flow ??? Small block to Bi block . Thanks

 

[scoflaw]

4" is standard diameter small or big, But..the BB is a wider motor.

 

[Bt Doctur]

Doubtful you can mix the SB and BB

 

[duckmnn]

4" is standard diameter small or big, But..the BB is a wider motor.

The original pipe I measured . It’s same measurement 30” outside to outside as is this other pipe. The tubes are same also about 21/2 at rubber boot . I thought there was a 3” pipe and a 4” maybe not . Thanks