WATCH FOR BULKHEAD CRACKING! The older ski's that were hotrodded had major problems with the bearing plate pushing the bulkhead right out of the ski.

 

That was one of my concerns. I went with a 550 pump because there is less stress on the bulkhead area. I sacrificed top end but she is awesome off the line. I used it alot so far and all is good. I still have exhaust issues but I'm working on them.