can exhaust risers be rotated?

[AGUESS]

I am changing to thru hull exhaust on my Classic 18. If I install the risers (short glenwood marine) straight up, they hit or almost hit the teleflex steering calble that mounts to the drive transom plate.

Question.

Can I rotate these risers so the top (hump) lies sideway instead of straight up, and will this cause any problem with back wash into the engine.

The risers have not been drilled to match the manifold and the transom has not been cut, so all options are open.

Your help is appreciated.

Alex.

[mrfixxall]

no,,they have to be straight up or the water will rush back in when the engine is not running..i have a set i will sell that have been shortened and welded together that i ran on my x for many years that are still in good shape ill let go for 250.00...