[SSSammy]

I just went out and looked, I have some similar strike marks on the top of passenger side pipes. Never really looked till now. I measured the location of the cutouts on both sides .. the passenger side is 4-1/2" from the side louver cutout, exactly per the manual, page 72. The driver side is 5-1/8", or 3/8" too low, per the manual it should be 4 3/4".

Conclusion, one cutout is too low, but the one where the strikes are is per spec. Assuming the louvers are in the right place ... Possibly, a variation was introduced in the post 730 redesign that has not been fully characterized yet.

The ERA recommended bolt is through the motor mount on the driver side. I wonder if the passenger side motor mount needs a bolt also to keep it from rising up?

Bob, what do you think is going on? I am using the recommended 31-2222 and 31-2223 mounts.

I suppose all this could be cured by a mandrel bend of all eight primaries of about 1/2" at the outboard end. Of course the ceramic would need to be redone.

Sam