Exhaust outlets

[Jetlink]

Ditching the Super Traps next spring for sure, saw some sales going on right now for the flapper style exhaust. Problem is, I am home and my boat is over an hour and a half away from me... What diameter do I need? 3 or 4 inch?

[Blackntan90]

My '90 Mariah with the PCM 351 has 3".From what I understand, 3" for small blocks and 4" for big blocks.

[Jetlink]

Thanks, ordering 3 inch outlets then.

[texas scarecrow]

where did you see them on sale?

[Jetlink]

Saw them at Whole Sale Marine, 3" exhaust flappers at $17.65 a pop. Checked Skidim, 3" exhaust flappers going for $22.99 and checked West Marine, $26.99... Cheapest I found so far so, I went with it. They have a sale going through the end of the week I think over at Whole Sale Marine.

Edit: Holy cow that was fast! Ordered the parts late in the day on the 25th, box just showed up at my front door!