Gil hp500 riser alignment
 

So i have my gil/hardin manifolds and hp500 risers. My boats holes are are about 1.5-2" higher then the standard bravo exit. What are my options to make this work without cutting new holes?. What would a 3/4 wedge on the backside do to the final dimension on on the tail with these and would it mess up water flow. Or does someone make an 02 spacer plate that's about 1.5-2. All I can find are the Seward style ones. Thanks for the input.

I have a Sutphen 30. My Iron eagle heads have exhaust ports a little higher than stock. I used the wedges and elongated my exhaust holes then covered them with a trim piece (rubber with a black plastic circumference). Looks fine.

How far off were you and what size wedge to tail change ratio? I've heard of the trim ring deal but I'm 2" off not sure if a trim ring is gonna do it.

If you use wedges, there is good chance you will get reversion. Have a machine shop make spacers like these https://www.offshoreonly.com/forums/...in-marine.html
Maybe reach out OSO member Brad Christy??

Summer89,

Are you trying to elevate your tails to match existing holes in your transom?

Thanks. Brad.

Brad yes somehow.
and Griff that's a bit of my concern.

Watching..... I may be changing out manifolds soon as well.

I found tbese guys and they can make up the size i need. As they make a lot of oem style ones the gil flange matches up to a stock number. https://affordable-fuel-injection.co...adapter-plate/