I am having a 540 built and wanted to use my existing CMI's off of my hp500, will they fit? I also wanted to replace the CMI's with a set of EMI manifolds that came off of the 540, will those fit?

Thanks

The headers should fit, however the tailpipes might be a little off. Just did a similiar project with 502s into 540s. I had to order custom tail from CMI. My old ones were too short. Very spendy.

I am more concerned with the EMI's going on the hp500 since I am selling the boat in the near future.