Why call it an upgrade, the 525 has been one of mercs best performance engines and alot of them make nearly 565 hp. If u want more hp save your money and put a whipple on it and get nearly 800 hp reliably.
Yep. There are quite a few upgrades that the 565 hi -perf engine has over the 525.
We received a customer order for a 2013 Checkmate 26 Convincer with a 565 to be built here shortly.