Speaking of exhaust, does anyone have a used Merc or Aquapower riser they want to get rid of cheap? I want to do some testing, and can't bring myself to drill holes in a brand new riser. I don't care if it's corroded, or beat up, as long as it's not cracked or leaking.

i have 2 freshwater only risers from my manifolds... just collecting dust...

Email me about the risers. [email protected]

I have been comparing the Stainless Marine to the GLM and the insides look very similar on the small black application. I have only looked at pictures so far. The picture of the small block manifold cut out is in the latest Hot Boat and it is a picture on page 114 on the right of the display is the small block manifold. Looks very similar to the GLM. Dwight

220BR, they make an actual back pressure gauge. OTC makes it: OTC7215. It's about $100.00

Paul

Has anyone else ckd out the 2 manifolds that I mentioned? Just wondering what everyone else thinks. Dwight

If noise regulations are a significant issue, then run thru the outdrive. If there is more than 10hp to be gained on a 330+/- hp smallblock with center risers by going thru the transom, I'd be surprised.